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Join us as we look back at the best photos of Prince William and Princess Kate's three children — Prince George, Princess Charlotte and Prince Louis — as they've grown up in the public eye over the years, starting with this great image…
"Happy 9th Birthday, Princess Charlotte!" Prince William and Princess Kate captioned this beautiful photo of their middle child — which was snapped by the Princess of Wales — that they posted on social media to mark her latest birthday on May 2, 2024.
Keep reading to see more great photos of the Prince and Princess of Wales' children through the years…
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"Happy 6th Birthday, Prince Louis! Thank you for all the kind wishes today," the Prince and Princess of Wales captioned this photo of their youngest child, which they shared on their official @KensingtonRoyal X account to mark Louis's birthday on April 23, 2024. Princess Kate snapped the sweet photo.
MORE: See the first 30 British royals in the line of success behind King Charles III
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In honor of Prince George's 10th birthday in July 2023, Kensington Palace released a new portrait of the future king that was taken in Windsor, England, to mark his milestone day.
MORE: See the best photos of Kate Middleton in her first year as the new Princess of Wales
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Princess Charlotte waved from the balcony of Buckingham Palace in London following the coronation of King Charles III on May 6, 2023.
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Prince Louis was up to his usual antics while on the balcony of Buckingham Palace in London following the coronation of King Charles III on May 6, 2023.
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Notorious royal rascal Prince Louis playfully blew out big sister Princess Charlotte's candle at the Together At Christmas carol service — which is spearheaded by the Princess of Wales and supported by The Royal Foundation — at Westminster Abbey in London on Dec. 8, 2023.
Keep reading to see the Wales trio when all their candles were aflame…
MORE: See the best photos of the royal family at the 2023 Christmas carol service
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Prince William and Princess Kate brought their children — Prince George, Princess Charlotte and Prince Louis — to the Together At Christmas carol service at Westminster Abbey in London on Dec. 8, 2023, where the young royals carried candles as the festivities kicked off.
Spearheaded by the Princess of Wales and supported by The Royal Foundation, the service is a moment to bring people together at Christmas time and recognize those who have gone above and beyond to help others throughout the year.
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Prince George, Princess Charlotte and Princess Kate watched on as Prince Louis took his time extinguishing his candle at the taping of the "Royal Carols: Together at Christmas" TV special — which they attended with Prince William — at Westminster Abbey in London on Dec. 8, 2023.
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On Dec. 10, 2023, Kensington Palace released this photo of Prince William and Princess Kate with their three children — Prince George, Princess Charlotte and Prince Louis — which is featured on their Royal Highnesses' 2023 Christmas card. The image was taken by photographer Josh Shinner in Windsor, England, earlier in the year.
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Princess Charlotte attended Christmas Day church services at St. Mary Magdalene Church in Sandringham in Norfolk, England, on Dec. 25, 2023.
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Prince George half-tuned out his dad, Prince William, as they arrived in the stands to watch a match in the Rugby World Cup 2023 quarter final match at Stade Velodrome in Marseille, France, on Oct. 14, 2023.
The future kings — wearing matching navy suits and red ties — made the trip to France to support Wales in the quarterfinals as the team played Argentina. William is patron of the Welsh Rugby Union.
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Prince George looked all grown up as he greeted Gerald Davies, who's president of the Welsh Rugby Union, alongside his father, Prince William — who's patron of the union — before the Rugby World Cup 2023 quarter final match at Stade Velodrome in Marseille, France, on Oct. 14, 2023.
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Prince Louis waved to the press as he sat inside a vehicle on a C17 plane during a visit to the Air Tattoo at RAF Fairford in Fairford, England, on July 14, 2023, during a Royal Air Force facility visit with his parents and siblings.
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Princess Charlotte wore a pint-sized pair of sunglasses as she watched the Men's Singles final match from the Royal Box on Centre Court on day 14 of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club in London on July 16, 2023.
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Prince William and Princess Kate brought Prince George, Prince Louis and Princess Charlotte to check out the inside of a Royal Air Force C-17 plane during a visit to the Air Tattoo at RAF Fairford in Fairford, England, on July 14, 2023.
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Prince George and Prince William checked out the inside of a Royal Air Force plane during a visit to the Air Tattoo at RAF Fairford in Fairford, England, on July 14, 2023.
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Princess Charlotte and Prince George joined their parents, Princess Kate and Prince William, to watch the Men's Singles final match on day 14 of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club in London on July 16, 2023.
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Princess Charlotte and Prince George smiled and waved — that's tennis legend Chris Evert behind them — from the Royal Box on Centre Court during the Men's Singles final match on day 14 of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club in London on July 16, 2023.
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Princess Charlotte was all smiles as she watched the Men's Singles final match from the Royal Box on Centre Court on day 14 of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club in London on July 16, 2023.
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Prince George talked to dad Prince William during the Men's Singles final match as they watch Carlos Alcaraz play Novak Djokovic from the Royal Box on Centre Court on day 14 of the Wimbledon Tennis Championships at the All England Lawn Tennis and Croquet Club in London on July 16, 2023.
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Prince Louis made a face on the balcony of Buckingham Palace while watching a Royal Air Force fly-past during Trooping the Colour in London on June 17, 2023.
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Prince Louis, Prince George and Princess Charlotte headed to their carriage for the Trooping the Colour ceremony at Horse Guards Parade in London on June 1, 2023.
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Prince George, Prince Louis — looking a little bored — and Princess Charlotte stood on the balcony of Buckingham Palace to watch a Royal Air Force fly-past during Trooping the Colour in London on June 17, 2023.
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Princess Charlotte gave little brother Prince Louis a look as he held his nose while riding in a carriage during Trooping the Colour in London on June 17, 2023.
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Prince George, Prince Louis and Princess Charlotte rode in a carriage during Trooping the Colour in London on June 17, 2023.
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Prince Louis pointed at something while riding in a carriage with siblings Prince George and Princess Charlotte during Trooping the Colour in London on June 17, 2023.
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Prince George stuck out his tongue while riding in a carriage with Prince Louis and Princess Charlotte during Trooping the Colour in London on June 17, 2023.
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Princess Charlotte looked at her mother, Princess Kate, while riding in a carriage during Trooping the Colour in London on June 17, 2023.
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Princess Charlotte tried her hand at archery while taking part in the Big Help Out volunteering drive — the final event of grandfather King Charles III's coronation festivities — during a visit to the 3rd Upton Scouts Hut in Slough, England, on May 8, 2023, where she and her siblings and parents helped to renovate and improve the building during their visit.
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Prince George, Princess Charlotte and Prince Louis posed for a group picture with volunteers taking part in the Big Help Out volunteering drive — the final event of their grandfather King Charles III's coronation festivities — during a visit to the 3rd Upton Scouts Hut in Slough, England, on May 8, 2023. The Prince and Princess of Wales and their children helped to renovate and improve the building during their visit.
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Prince Louis enjoyed a toasted marshmallow while taking part in the Big Help Out volunteering drive — the final event of grandfather King Charles III's coronation festivities — during a visit to the 3rd Upton Scouts Hut in Slough, England, on May 8, 2023. The Prince and Princess of Wales and their children helped to renovate and improve the building during their visit.
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King Charles III and his heirs — Prince William and Prince George — are pictured in the Throne Room at Buckingham Palace in London on coronation day, May 6, 2023, in an official coronation portrait released by the palace.
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Prince George, the page of honor, made a face alongside the other pages at the coronation ceremony of King Charles III and Queen Camilla in Westminster Abbey in London on May 6, 2023.
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Prince Louis and Princess Charlotte looked angelic as they arrived at Westminster Abbey in London for the coronation of King Charles III and Queen Camilla on May 6, 2023.
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Prince Louis tried his hand at archery while taking part in the Big Help Out volunteering drive — the final event of grandfather King Charles III's coronation festivities — during a visit to the 3rd Upton Scouts Hut in Slough, England, on May 8, 2023, where he and his siblings and parents helped to renovate and improve the building during their visit.
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Princess Charlotte tried her hand at archery while taking part in the Big Help Out volunteering drive — the final event of grandfather King Charles III's coronation festivities — during a visit to the 3rd Upton Scouts Hut in Slough, England, on May 8, 2023, where she and her siblings and parents helped to renovate and improve the building during their visit.
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Prince George tried his hand at archery while taking part in the Big Help Out volunteering drive — the final event of grandfather King Charles III's coronation festivities — during a visit to the 3rd Upton Scouts Hut in Slough, England, on May 8, 2023, where he and his siblings and parents helped to renovate and improve the building during their visit.
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Prince Louis pointed out something to sister Princess Charlotte during the coronation ceremony of King Charles III and Queen Camilla in Westminster Abbey in London on May 6, 2023.
MORE: See the best photos of the newly titled Queen Consort Camilla since her marriage to King Charles III
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Princess Charlotte waved while little brother Prince Louis had something to say on the balcony of Buckingham Palace in London following the coronation of King Charles III on May 6, 2023.
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Prince Louis and big brother Prince George traveled towards Buckingham Palace in a coach following the coronation of King Charles III and Queen Camilla at Westminster Abbey in London on May 6, 2023.
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Princess Charlotte waved while little brother Prince Louis raised the roof alongside their parents, Princess Kate and Prince William, on the balcony of Buckingham Palace in London following the coronation of King Charles III on May 6, 2023.
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Prince Louis yawned alongside sister Princess Charlotte while seated with parents Prince William and Princess Kate during the coronation ceremony of King Charles III and Queen Camilla in Westminster Abbey in London on May 6, 2023.
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Prince George — the page of honor — was flanked by fellow pages Lord Oliver Cholmondley, Nicholas Barclay and Ralph Tollemache at the coronation ceremony of King Charles III and Queen Camilla in Westminster Abbey in London on May 6, 2023.
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Kensington Palace released this photo of Princess Charlotte of Wales to mark her 8th birthday on May 2, 2023. The portrait was taken by her mother, Princess Kate, in Windsor, England, the weekend before the young royal's birthday.
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Kensington Palace released this photo of some of Queen Elizabeth II's grandchildren and great-grandchildren — including the Prince and Princess of Wales' three kids — to mark what would have been the late monarch's 97th birthday in April 2023. The photograph was taken by Princess Kate at the monarch's Balmoral estate in Scotland in the summer of 2022. Back row, from left: Lady Louise Mountbatten-Windsor and James, Earl of Wessex. Middle row, from left: Lena Tindall, Prince George, Princess Charlotte, Isla Phillips, Prince Louis. Front row, from left: Mia Tindall holding Lucas Tindall, Queen Elizabeth II and Savannah Phillips.
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Kensington Palace released this photo of Prince Louis — which was taken by photographer Millie Pilkington in Windsor, England — to mark his 5th birthday on April 23, 2023.
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Princess Kate pushed her youngest child, Prince Louis, in a wheelbarrow in Windsor, England, in this snapshot released by Kensington Palace to mark the young royal's 5th birthday on April 23, 2023.
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Prince Louis made a funny face on his way to the Easter Mattins Service at St. George's Chapel at Windsor Castle in England on April 9, 2023.
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Princess Charlotte shook hands with bishop David Conner as Princess Kate smiled following the Easter Mattins Service at St. George's Chapel at Windsor Castle in England on April 9, 2023.
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Princess Kate and her daughter, Princess Charlotte, coordinated in blue ensembles at the Easter Mattins Service at St. George's Chapel at Windsor Castle in England on April 9, 2023.
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For the first time ever, Prince Louis joined his parents and siblings for the Christmas services at St. Mary Magdalene Church at King Charles III's Sandringham estate in Norfolk, England, on Dec. 25, 2022.
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Prince Louis kept close to his big sis, Princess Charlotte, following the Christmas services at St. Mary Magdalene Church at King Charles III's Sandringham estate in Norfolk, England, on Dec. 25, 2022.
MORE: See the best photos from Queen Elizabeth II's state funeral
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Prince George trailed behind his dad, Prince William, as they arrived at the Christmas services at St. Mary Magdalene Church at King Charles III's Sandringham estate in Norfolk, England, on Dec. 25, 2022.
MORE: All the best photos from Queen Elizabeth II's Platinum Jubilee celebrations in 2022
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Prince William and Princess Kate brought their two oldest kids, Princess Charlotte and Prince George, to Kate's Together at Christmas carol service at Westminster Abbey in London on Dec. 15, 2022.
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On Dec. 13, 2022, the Prince and Princess of Wales released their 2022 Christmas card photo, which features their family — Prince William and Princess Kate flanking their three children, Prince George, Princess Charlotte and Prince Louis — on a walk in Norfolk, England.
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Britain's Princess Charlotte of Wales gazed at mourners as her car followed the coffin of great-grandmother Queen Elizabeth II as it traveled on the State Gun Carriage of the Royal Navy from Westminster Abbey to Wellington Arch in London on Sept. 19, 2022, during the monarch's state funeral.
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Prince George pondered his feelings while watching the Platinum Pageant in London, the final event celebrating Queen Elizabeth II's Platinum Jubilee marking 70 years on the throne, on June 5, 2022. Cousins Savannah Phillips and Zara Tindall sat in the row behind him.
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Princess Charlotte wore white sandals and a striped summer dress with a Peter Pan collar as she joined her parents for a visit to the SportsAid House at the 2022 Commonwealth Games in Birmingham, England, on Aug. 2, 2022.
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Too loud! Prince Louis of Cambridge covered his ears on the Buckingham Palace balcony during the Trooping the Colour Royal Air Force fly-past on June 2, 2022.
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Prince Louis pulled a face while watching the Platinum Jubilee Pageant in London, the final event celebrating Queen Elizabeth II's Platinum Jubilee marking 70 years on the throne, on June 5, 2022.
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Prince Louis's antics continued! He stuck out his tongue while watching the Platinum Jubilee Pageant in London, the final event celebrating Queen Elizabeth II's Platinum Jubilee marking 70 years on the throne, on June 5, 2022.
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This playful snapshot of the adorable trio horsing around with dad Prince William in Norfolk, England, in June 2020 was snapped by Duchess Kate and shared by Kensington Palace in honor of the Duke of Cambridge's 38th birthday on June 21 — which happened to fall on Father's Day.
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Princess Charlotte posed with her family's pet cocker spaniel in a portrait taken by her mother, Duchess Kate, in a field of bluebells near their country home, Anmer Hall, in Norfolk, England, the weekend before her 7th birthday on May 2, 2022.
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Kensington Palace released this photo of Prince Louis holding a cricket ball on a beach in Norfolk, England — it was taken by his mother, Duchess Kate — to mark his 4th birthday on April 23, 2022. Keep reading to see another adorable pic from the set…
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Kensington Palace released this photo of Prince Louis, which was taken by his mother, Duchess Kate, at a beach in Norfolk, England, to mark his 4th birthday on April 23, 2022.
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Princess Charlotte was a mini-me version of mom Princess Kate as she arrived at London's Westminster Abbey for the state funeral of her great-grandmother Queen Elizabeth II on Sept. 19, 2022.
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Prince George and Princess Charlotte stood outside Westminster Abbey in London during the state funeral of great-grandmother Queen Elizabeth II on Sept. 19, 2022. Charlotte notably wore a diamond horseshoe brooch — a gift from the queen when she was still alive — on her black coat dress to honor the monarch's lifelong love of horses. She also wore a hat to a royal event for the first time.
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Prince George meant business at little sister Princess Charlotte's christening at the Church of St. Mary Magdalene on the queen's Sandringham Estate on July 5, 2015.
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Days after moving from London to a new home in Windsor, England, about an hour away, Prince George, Prince Louis and Princess Charlotte — accompanied by parents William and Kate just one day before they became the new Prince and Princess of Wales upon the death of Queen Elizabeth II and the accession of King Charles III — headed to a settling-in afternoon at their new school, Lambrook School near Ascot in England's Berkshire region, on Sept. 7, 2022. The settling-in afternoon is an annual event held to welcome new student and their families to Lambrook and takes place the day before the start of the new school term.
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To celebrate Prince George's 9th birthday on July 22, 2022, parents Prince William and Duchess Kate shared this new photo of their eldest son — which was taken by his mother while on holiday in the U.K. earlier in the month — on their official @DukeandDuchessofCambridge Instagram account. Isn't he starting to look more and more like his dad?
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Princess Charlotte and Prince George arrived via car to attend at the state funeral of great-grandmother Queen Elizabeth II at Westminster Abbey in London on Sept. 19, 2022.
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Princess Charlotte laughed as she conducted a band playing "We Don't Talk About Bruno" from Disney's "Encanto" next to brother Prince George during a visit to Cardiff Castle in Wales on June 4, 2022, as part of the royal family's tour for Queen Elizabeth II's Platinum Jubilee celebrations.
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Prince William, Duchess Kate and their children — Prince George and Princess Charlotte — checked out the music setup backstage during a visit to Cardiff Castle in Wales on June 4, 2022, as part of the royal family's tour for Queen Elizabeth II's Platinum Jubilee celebrations.
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Prince Louis covered his ears on the Buckingham Palace balcony alongside great-grandmother Queen Elizabeth II during her Trooping the Colour birthday celebration kicking off her Platinum Jubilee weekend on June 2, 2022.
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Prince George, Prince Louis and Princess Charlotte waved in unison during the Trooping the Colour carriage procession — their first time participating — which kicked off Queen Elizabeth II's Platinum Jubilee celebrations in London on June 2, 2022.
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Prince George, Prince Louis and Princess Charlotte respectfully bowed their heads as they passed the Colour — the troops assembled outside Buckingham Palace in London — in their carriage during Trooping the Colour, which kicked off Queen Elizabeth II's Platinum Jubilee celebrations in London on June 2, 2022. It was the trio's first time participating in the carriage procession at the annual event.
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Prince Louis of Cambridge, Duchess Kate, Princess Charlotte of Cambridge and Prince George of Cambridge watched the Trooping the Colour festivities as Queen Elizabeth II's Platinum Jubilee celebrations kicked off on June 2, 2022.
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Duchess Kate and Prince William brought their two older children — Prince George and Princess Charlotte — to Easter Sunday services at St. George's Chapel at Windsor Castle in Windsor, England, on April 17, 2022, as other family members (including Sophie, Countess of Wessex and Prince Edward with their kids, Lady Louise Windsor and James, Viscount Severn) followed behind.
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Prince George and Princess Charlotte departed the service of thanksgiving celebrating the life of their late great-grandfather, Prince Philip, at Westminster Abbey in London on March 29, 2022.
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Princess Charlotte departed a service of thanksgiving celebrating the life of her late great-grandfather, Prince Philip, at Westminster Abbey in London on March 29, 2022.
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Prince George stood next to his father as he waited to greet clergy members at the service of thanksgiving celebrating the life of his late great-grandfather, Prince Philip, at Westminster Abbey in London on March 29, 2022.
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Mom Duchess Kate took this pic of her youngest son, Prince Louis, on his bike as he left for his first day at the Willcocks Nursery School during his birthday week, Kensington Palace shared. He turned 3 on April 23, 2021.
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Prince George posed for this, photo which was taken by his mother Duchess Kate in Norfolk, England, in July 2021 to mark the occasion of his 8th birthday on July 22, 2021.
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Princess Charlotte posed for her mother, Duchess Kate, in Norfolk, England, in April 2019 to mark her 4th birthday on May 2, 2019.
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Prince George and his parents appear in the stands during the UEFA EURO 2020 football final between Italy and England in London on July 11, 2021.
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Princess Charlotte whispered to big brother George in their box at a Dec. 11, 2020, pantomime performance at London's Palladium Theatre hosted by The National Lottery to thank key workers and their families for their efforts throughout the COVID-19 pandemic.
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Prince William and Duchess Kate and their children — Prince Louis, Princess Charlotte and Prince George — walked their very first red carpet on their way into a special Dec. 11, 2020, pantomime performance at London's Palladium Theatre hosted by The National Lottery to thank key workers and their families for their efforts during the coronavirus pandemic.
RELATED: The cutest photos of Prince George
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Prince William, Duchess Kate and their kids — Prince George, Princess Charlotte and Prince Louis — clapped for National Health Service carers as part of the BBC Children In Need and Comic Relief "Big Night In" on April 23, 2020.
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This portrait of Princess Charlotte was shared by Prince William and Duchess Kate to mark the young royal's 5th birthday on May 2, 2020. Making it even sweeter? The photograph was taken by Kate on the queen's Sandringham Estate.
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Prince William and Duchess Kate released this super-cute shot of Princess Charlotte, which her mom snapped in Norfolk, England, to mark her 6th birthday on May 2, 2021.
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Princess Charlotte posed in a field of bluebells in a portrait taken by her mother, Duchess Kate, near their country home, Anmer Hall, in Norfolk, England, the weekend before her 7th birthday — May 2, 2022.
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In one of the most iconic images of the modern royals, President Barack Obama and Prince William had a pre-bedtime talk with Prince George at Kensington Palace in London on April 22, 2016.
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A playful Princess Charlotte stuck out her tongue after watching mom Duchess Kate race dad Prince William in the inaugural King's Cup regatta in Cowes, England, on Aug. 8, 2019.
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He's getting so big! Duchess Kate snapped this portrait of her camouflage-clad eldest son, Prince George, in July 2020. She and husband Prince William released the photo to mark George's 7th birthday on July 22.
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Duchess Kate brought kids Prince Louis, Princess Charlotte and Prince George to a special Dec. 11, 2020, pantomime performance at London's Palladium Theatre hosted by The National Lottery to thank key workers and their families for their efforts throughout the COVID-19 pandemic.
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Duchess Kate snapped this photo of her third child, Prince Louis, in April 2020. She and husband Prince William released it in celebration of Louis's 2nd birthday on April 23, 2020.
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Duchess Kate shot this portrait of Prince Louis at their country home in Norfolk, England, in April 2019 to celebrate his 1st birthday on April 23.
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Duchess Kate also captured this photo of Prince William posing on a swing with his children — Prince George, Princess Charlotte and Prince Louis — to mark both William's 38th birthday and Father's Day on June 21, 2020.
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Prince William, Duchess Kate, Prince George, Princess Charlotte and Prince Louis met with Sir David Attenborough in the gardens of Kensington Palace in London on Sept. 24, 2020, after an outdoor screening of Sir David's new film "David Attenborough: A Life On Our Planet."
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Kensington Palace released this photo of a smiling Prince George to mark his 7th birthday on July 22, 2020. It, too, was taken by — you guessed it — his mother, Duchess Kate.
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Kensington Palace released this photo of Princess Charlotte to mark her 5th birthday. It was taken in April by her mother, the Duchess of Cambridge, on the queen's Sandringham Estate, where the family helped to pack up and deliver food packages for isolated pensioners in the local area.
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Prince George stood on tippy toes to look at sister Princess Charlotte in her pram after her christening at the Church of St. Mary Magdalene on the queen's Sandringham Estate in King's Lynn, England, on July 5, 2015.
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That face! Duchess Kate and Prince Louis celebrated Trooping the Colour — his first — on the balcony at Buckingham Palace in London on June 8, 2019.
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Prince Louis, Prince George and Princess Charlotte celebrated Trooping the Colour (it was Louis' first!) with Mum and Dad on the balcony at Buckingham Palace in London on June 8, 2019.
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Princess Charlotte — who's known as "Charlotte Cambridge" among her new classmates — arrived for her first day of school at Thomas's Battersea in London alongside big brother Prince George and their parents, Duchess Kate and Prince William, on Sept. 5, 2019.
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Prince George is seen smiling in a photo taken by his mother in the garden at Kensington Palace to celebrate his 6th birthday on July 22, 2019.
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Dad Prince William watched as new walker Prince Louis explored the garden Duchess Kate co-designed with Adam White and Andree Davies for the RHS Chelsea Flower Show in London on May 19, 2019.
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Prince George and Princess Charlotte swung their legs over a brook as they explored the garden mom Duchess Kate co-designed with Adam White and Andree Davies for the RHS Chelsea Flower Show in London on May 19, 2019.
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Princess Charlotte and Prince George ran around together in a field next to the Maserati Royal Charity Polo Trophy match — dad Prince William was competing — at Beaufort Park in Gloucester, England, on June 10, 2018.
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Siblings sneaking a peek! Prince George, Prince Louis and Princess Charlotte looked out of a window at Buckingham Palace in London during their great-grandmother the queen's official birthday celebration, Trooping the Colour, on June 8, 2019.
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Prince George was a lacy bundle of attitude before his christening at the Chapel Royal at St. James's Palace in London on Oct. 23, 2013.
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Princess Charlotte played on a rope ball swing in the garden mom Duchess Kate co-designed with Adam White and Andree Davies for the RHS Chelsea Flower Show in London on May 19, 2019.
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Prince George is seen laughing in a photo taken by his mother in the garden at Kensington Palace to celebrate his 6th birthday on July 22, 2019.
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To celebrate Prince George's 5th birthday on July 22, 2018, Prince William and Duchess Kate released this adorable image of the heir to the British throne at Clarence House in London on July 9.
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Duchess Kate revealed newborn Princess Charlotte's sweet face to the world for the first time as they left the Lindo Wing at St. Mary's Hospital in London on May 2, 2015.
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An heir is born! Prince William and Duchess Kate introduced the world to their newborn son Prince George outside the Lindo Wing of St. Mary's Hospital in London on July 23, 2013.
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Duchess Kate introduced adorable newborn Prince Louis to the world outside St. Mary's Hospital in London on April 23, 2018.
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Sibling sweeties! Princess Charlotte and Prince George served as a bridesmaid and a pageboy in second cousin Princess Eugenie's wedding at St. George's Chapel at Windsor Castle on Oct. 12, 2018.
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Duchess Kate carried Princess Charlotte while attending a children's party for military families during a royal tour of Canada in Victoria on Sept. 29, 2016.
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Prince George checked out a helicopter before departing from Hamburg Airport on the last day of his parents' official visit to Germany on July 21, 2017.
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Princess Charlotte of Cambridge arrived at uncle Prince Harry and Meghan Markle's wedding — she was a bridesmaid! — at St. George's Chapel at Windsor Castle on May 19, 2018.
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Prince William, Duchess Kate and Prince George shared an adorable moment while visiting the Taronga Zoo in Sydney on April 20, 2014, during their tour of Australia.
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Prince George blew bubbles at a children's party for military families during his family's royal tour of Canada in Victoria on Sept. 29, 2016.
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Duchess Kate and son Prince Louis explored the garden she co-designed with Adam White and Andree Davies for the RHS Chelsea Flower Show in London on May 19, 2019.
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Duchess Kate carried Prince Louis while Princess Charlotte held dad Prince William's hand as they exited the Chapel Royal at St. James's Palace in London on July 9, 2018, following Louis' christening.
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Princess Charlotte played with balloons at a children's party for military families during her family's royal tour of Canada in Victoria on Sept. 29, 2016.
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Prince George and Princess Charlotte looked out the window of their Royal Air Force plane as they arrived in Warsaw, Poland, on July 17, 2017.
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Prince William kissed Prince George outside the Lindo Wing at St. Mary's Hospital in London after the birth of Princess Charlotte on May 2, 2015.
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Free as a bird! Princess Charlotte frolicked in the grass as her father, Prince William, played in the Maserati Royal Charity Polo Trophy match at Beaufort Park in Gloucester, England, on June 10, 2018.
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Prince William lovingly played with son Prince Louis on a rope ball swing in the garden Duchess Kate co-designed with Adam White and Andree Davies for the RHS Chelsea Flower Show in London on May 19, 2019.
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Prince George looked smart in his pageboy uniform after the royal wedding of uncle Prince Harry and Meghan Markle at St. George's Chapel at Windsor Castle on May 19, 2018.
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Princess Charlotte and Prince George were delighted by the airplanes and crowds during the annual Trooping the Colour in London on July 17, 2017.
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Prince George posed for this photo on his parents' estate in Norfolk, England, in a photo released by Prince William and Duchess Kate on July 22, 2016, to celebrate his 3rd birthday.
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Little bridesmaid Princess Charlotte rocked a flower crown at aunt Pippa Middleton's wedding at St. Mark's Church in Englefield, England, on May 20, 2017.
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Prince George posed for a pic on his first day at the Westacre Montessori nursery school near Sandringham in Norfolk, England, on Jan. 6, 2016.
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Princess Charlotte looked adorable in this 2nd birthday portrait, which was released on May 2, 2017.
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Prince George of Cambridge played with a wooden bead maze at a Plunkett's Parent's Group playdate at Government House in Wellington, New Zealand, on April 9, 2014, during his parents' tour of the country.
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Princess Charlotte clutched a bouquet of flowers as she arrived in Berlin with her parents on July 19, 2017.
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Princess Charlotte flashed a smile to the assembled media as she and dad Prince William arrived at St. Mary's Hospital in London to visit newborn baby brother Prince Louis on April 23, 2018.
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Prince William cuddled daughter Princess Charlotte during a family ski vacation in the French Alps on March 3, 2016.
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Duchess Kate and Prince George of Cambridge attended a Plunkett's Parent's Group playdate at Government House in Wellington, New Zealand, on April 9, 2014, during a royal tour Down Under.
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Photographers got a peek at Princess Charlotte's pretty little face as she was pushed in her Silver Cross pram on her christening day, July 5, 2015.