By Jessica Wedemeyer
8:00pm PDT, May 10, 2023
_
It pains us to say, but Millie Bobby Brown is all grown up! In just a few short years, we've watched the "Stranger Things" actress completely transform from an adorable child star into a true Hollywood fashionista — and in 2023, she grew up even more when she got engaged at 19. Join us as we take a look back at some of MBB's most mature fashion moments, starting with this ensemble…
In May 2023, Millie Bobby Brown wore an embellished red look by Annie's Ibiza — the Ziggy set, which is comprised of a bustier top, high-waist shorts and a bolero jacket, plus matching cowboy boots — to the Osaka Comic Con opening ceremony in Japan. Keep reading for a closer look…
MORE: Follow Wonderwall on MSN for more fun celebrity & entertainment photo galleries and content
_
Millie Bobby Brown wore a glamorous pink Louis Vuitton gown embellished with metallic flowers to the world premiere of "Enola Holmes 2" in New York City in October 2022.
MORE: 18 child stars who grew up to be total hunks
_
Millie Bobby Brown looked chic in a playful black blazer-style minidress paired with sheer tights and black patent leather pumps as she arrived for an appearance on "Good Morning America" in New York City in October 2022.
MORE: Hollywood stars who just don't seem to age
_
Millie, is that you?! When we saw "Stranger Things" star Millie Bobby Brown on a May 2022 episode of "The Tonight Show Starring Jimmy Fallon," we accidentally mistook her for Ashlee Simpson or a young Britney Spears! She donned a pretty purple RaisaVanessa set — shimmery leggings and an off-the-shoulder long-sleeve top with a feathered neckline — with sky-high platform sandals for the occasion.
_
With her fresh new bangs and long blonde locks, we barely recognized Millie Bobby Brown at the "Stranger Things" season 4 premiere in New York City in May 2022. In a stunning belted Louis Vuitton gown with a corset bodice and a thigh-hit slit, it was clear her child star days were officially behind her!
_
Millie Bobby Brown went full goth during the 2022 BAFTA Awards in London in a black velvet Louis Vuitton gown with an oversized peplum waist, a peekaboo lace bandeau top and a partially sheer skirt. She completed her unexpected look with black opera gloves, a giant diamond ring and a necklace featuring a sword-shaped pendant.
_
For a Samsung 2022 Galaxy Creators Lounge Event in New York City in August 2022, Millie Bobby Brown choose a romantic take on the little black dress: She arrived in a lingerie-inspired lace-trimmed Louis Vuitton minidress paired with black heeled Mary Jane pumps and a sleek middle-parted ombre bob.
_
Millie Bobby Brown chose another unexpectedly mature Louis Vuitton look for the 2020 SAG Awards in Los Angeles: She donned an all-white ensemble comprised of a belted long-sleeve dress with a high-low hemline and tailored slacks. Can't you see someone like Meryl Streep also rocking this look?! But that wasn't her only all-grown-up look of the night…
RELATED: Celeb hair transformations of 2022
_
Millie Bobby Brown knocked it out of the park in a darling Givenchy off-the-shoulder dress with black lace trim along the bodice during a special screening of the third season of "Stranger Things" in Los Angeles in late 2019. We especially love her unique white sandals and grown-up styling: She rocked a bold red lip and wore her slick hairdo parted down the middle.
_
Millie Bobby Brown switched up her look following the 2020 SAG Awards, swapping her Louis Vuitton long-sleeve dress for a strapless white bustier top. She appeared to be wearing the same slacks as earlier in the evening while posing with "Stranger Things" co-star Noah Schnapp at Netflix's afterparty in West Hollywood.
_
Millie Bobby Brown was giving major girl-boss vibes in an asymmetrical plaid Monse suit during an early 2020 panel for "Stranger Things" in West Hollywood.
_
Millie Bobby Brown chose a leggy Paul & Joe look for the Teenage Cancer Trust Concert in London around the time she turned 18 in early 2022. She wore a billowy floral-print blouse and ruffle-trimmed short shorts with a brown crochet tank top featuring embroidered flowers and animal faces, plus massive pink sequin Moschino platform sandals.
_
OK, then! Millie Bobby Brown's street style was totally on-point when she stepped out in London in mid-2019 in an all-black Ralph Lauren ensemble — a belted leather jacket over a top with a high neckline and a pleated skirt — and white Tabitha Simmons sandals.
_
Millie Bobby Brown chose a sleeveless polka dot-print Rodarte dress with a tiered skirt for the 2018 BRIT Awards in London. Kirsten Dunst — who's 22 years older than the "Stranger Things" star — wore the exact same dress during the Venice Film Festival the previous year.
_
During a late 2019 party for Pandora in London, Millie Bobby Brown wore a super-chic Alice + Olivia coat over silky L'Agence separates: a button-down blouse and matching joggers. Let's take a closer look…
_
We need this coat! Millie Bobby Brown incited envy with her fiery Alice + Olivia coat during a launch event for the Pandora Me Collection in London in late 2019.
_
Love this look! Millie Bobby Brown paired a funky Antonio Berardi ensemble — a burgundy blazer slung across her shoulders over a black top with an architectural plaid miniskirt — with burgundy Doc Martens while out and about in London in mid-2019.
_
Though she's just a teenager, Millie Bobby Brown looked ready for happy hour in an Off-White ensemble — her colorful short shorts were just barely visible peeping out from under her tailored jacket — during a special screening of "Stranger Things" season 2 in New York City in mid-2018.
_
Millie Bobby Brown channeled Audrey Hepburn during a mid-2019 appearance on "The Tonight Show Starring Jimmy Fallon." Her chic Prada ensemble consisted of a black short-sleeve turtleneck top and an A-line skirt featuring a colorful floral motif plus images of hot air balloons, boats, statues and more.
_
Millie Bobby Brown was a vision in white in a short-sleeve Givenchy dress — with midriff cut-outs! — during the French premiere of "Godzilla: King of the Monsters" in Paris in mid-2019.
_
It was an olive Helmut Lang ensemble for Millie Bobby Brown during the 2019 WWD Beauty Inc Awards in New York City. She paired an oversized blazer with a silky knee-length dress and completed her look with black boots and a Fendi bag.
_
Millie Bobby Brown will see you now! In late 2018 — when she became UNICEF's youngest ever Goodwill Ambassador — the "Stranger Things" star attended a press conference in New York City looking poised and professional in a navy Calvin Klein coat over a turquoise Emilia Wickstead sheath. She completed her look with white Tabitha Simmons booties.
_
Millie Bobby Brown looked oh-so chic in a one-shoulder Oscar De La Renta gown with an asymmetrical hemline and a massive train during the Hollywood premiere of "Godzilla: King of the Monsters" in mid-2019.
_
Why so serious?! Millie Bobby Brown looked ready for business in a black leather long-sleeve Calvin Klein dress at the "Stranger Things" season 2 premiere in Los Angeles in late 2017.
_
During a late 2017 visit to the AOL Build Speaker Series studios in New York City, Millie Bobby Brown played with texture, sporting a sequin-embellished Rodarte bomber jacket over a shimmery cropped top and high-waist floral-print pants.
_
Fans were stunned when Millie Bobby Brown flashed her midriff in a black Rosie Assoulin ensemble — a cropped top with tulle pom pom shoulders and high-waist scalloped pants — during the 2018 MTV VMAs in New York City.
_
Name a teen who has better street style than Millie Bobby Brown! During a late 2017 visit to the SiriusXM studios in New York City, the "Stranger Things" star looked runway-ready in a fabulous Giamba ensemble: a floral embroidered miniskirt and a matching jacket — which she wore resting on her shoulders, of course! — over a black long-sleeve turtleneck.
_
Millie Bobby Brown struck a fierce over-the-shoulder pose in a custom black Calvin Klein dress with an open back during the 2018 Golden Globes in Los Angeles.
_
Lovely! Millie Bobby Brown stunned in a floral-print Markarian dress during a special screening of "Stranger Things" season 3 in New York City in late 2019. She wore her hair in loose curls and completed her A+ ensemble with fuchsia sandals.
_
During the "Stranger Things" season 3 premiere in Los Angeles in mid-2019, Millie Bobby Brown had a major couture moment in a pink off-the-shoulder Rodarte gown with a massive tulle cape that cascaded down from her shoulder blades.
_
Millie Bobby Brown wowed in sheer Rodarte separates — a ruffled long-sleeve blouse and a matching tiered skirt — during the 2017 MTV VMAs in Los Angeles.
_
Millie Bobby Brown looked simply out of this world in a sleeveless Oscar de la Renta gown featuring a star motif at the "Stranger Things" panel during PaleyFest in Los Angeles in early 2018.
_
During the 2018 Time 100 Gala in New York City, Millie Bobby Brown had a major princess moment in a white Dolce & Gabbana dress featuring an embroidered flower design.
_
Those shoes! Millie Bobby Brown paired some show-stopping Gucci pumps with a matching dress featuring a ruffled bodice during a visit to the "Good Morning America" studios in New York City in late 2017.
_
Millie Bobby Brown chose a preppy Calvin Klein ensemble for the brand's presentation during New York Fashion Week in early 2018. She wore a white long-sleeve turtleneck under a purple velvet jumper with a varsity-style embroidered W across the midriff and completed her look with a white leather jacket — resting on her shoulders, naturally!
_
Who wears short shorts? Millie Bobby Brown, of course! The "Stranger Things" star wore a CG suit — dress shorts and a blazer over a button-down blouse featuring two contrasting prints — during a mid-2017 visit to the "Late Show with Stephen Colbert" studios in New York City. She completed her look with funky Stuart Weitzman boots.
