Reese Witherspoon, more remember 9/11 on the 20th anniversary

We remember. It's been 20 years since the Sept. 11 attacks, which resulted in nearly 3,000 deaths. The horrific images of that fateful day remain seared into our heads, as do the memories. On the 20th anniversary of 9/11, many celebrities are sharing their feelings on social media and remembering those lost. "My prayers go out to all the families that lost their loves ones on this day 20 years ago. We will #neverforget. Forever in our hearts," Reese Witherspoon tweeted.

Click through to see who else is remembering 9/11 on social media…

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"20 years ago but feels like yesterday. We are all forever changed. Thinking of those who are gone and their loved ones missing them now and always." —Mark Wahlberg

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"It's been 20 years and we will never forget. Join me in praying for the loved ones of all those we lost. #NeverForget" –Jennifer Hudson

"20 years ago. It's hard to believe it's been so long since this devastating event in our history. Being in the city right now brings back so many memories. Everyone remembers where they were: when they got the call or seeing it on the news. Those of us who were living in New York saw a different city. A city in mourning yet together. Working together, supporting each other no matter what their beliefs, politics or economics. Those who lived downtown experienced such sadness from their local fire departments and police departments losing so many comrades. It was confusing and sad but New York showed up in its greatest form as it always does to help everyone get through it. To all of the families remembering their loved ones today, I share with you my love and condolences. #911 #neverforget" –Kate Hudson

"Will never forget this day. Will never forget the lives lost. Sending love and prayers to the families and loved ones of the fallen. #NeverForget" –Viola Davis

"On this anniversary of 9/11, I find myself remembering the shock and anguish we all experienced with painfully deep sadness. Vivid images of the skyline I grew up loving so much, suddenly changed forever. Still astonished by how many innocent people were lost in an instant, gone forever but never to be forgotten. Thinking of all the families still mourning their loved ones 20 years after that devastating and tragic moment in our history. #NeverForget" –Mariah Carey

"Sending love to New York and to all of you today #NeverForget" –Ellen DeGeneres

"Twenty years ago, nearly 3,000 lives were cut short by an unspeakable act of cowardice and hatred on 9/11. As a nation, we must never forget those we lost during one of the darkest moments in our history and the enduring pain of their families and loved ones." — United States President Joe Biden

"20 years later. And the impact of this day lives on. In the lives that were lost. In the hearts that were broken. In the friends & family members that continue to go on. In the spirit of resilience in my hometown. Take time today to hold onto your loved ones. #NeverForget" –Kerry Washington

"September 11th, 2001. 8:46 AM. I have never felt a greater sense of responsibility as I did that day. Today I'm remembering those we lost on 9/11, and keeping those they loved and who loved them in my heart. What do you remember from that day? I will #neverforget" –Katie Couric

"Today we mourn the victims and honor the heroes of a day that darkened our skies and broke our hearts 20 years ago. We found our way to the light and mended our hearts through our unity. We must never forget the pain, or the purpose. We owe it to the people who lost their lives and the heroes who charged into danger to ask ourselves today, and every day, what can we do for our fellow Americans? How can we help find the purpose and the unity we felt? How can each of us, in our own way, serve the United States. How can we unite, once again? Those evil bast*rds tried their best to divide us, and they failed. We were resilient — our towers and our fellow Americans fell — but in testament to them, we rose together. Let's once again honor the memory of the heroes of that day by proving we can come together to keep this nation the greatest in the world." –Arnold Schwarzenegger

"Remembering those who lost their lives and those whose lives were forever changed on this day 20 years ago. Never forget." —Ryan Seacrest

"20 years later, but my heart still breaks for the families of our fallen heroes on this tragic day. #NeverForget" –Luke Bryan

"20 years ago… We will never forget – Céline xx… #GodBlessAmerica #September11 #NeverForget #911anniversary" –Celine Dion

"Today we honor the nearly 3,000 men, women, and children who died on September 11, 2001, and the heroes who have always run towards danger to do what's right. Let's never forget that day, and let's never take them for granted." –Former President Barack Obama

"For the great people of our country, this is a very sad day. Sept. 11th represents great sorrow for our country. Many things were displayed that day, including, most importantly, the bravery of our police, fire, and first responders of every kind." –Former President Donald Trump

"Thinking of everyone mourning someone on this 9/11. #LoveNeverDies" –Patricia Arquette

"#NeverForget ⁦@FDNY" –Denis Lear, who shared the names of all the firefighters who died in the attacks on Sept. 11, 2001.

"My thoughts and prayers — and those of my family and the entire nation — remain with the victims, survivors and families affected, as well as the first responders and rescue workers called to duty. My visit to the site of the World Trade Center in 2010 is held fast in my memory. It reminds me that as we honor those from many nations, faiths and backgrounds who lost their lives, we also pay tribute to the resilience and determination of the communities who joined together to rebuild." –Queen Elizabeth II

"It never stops being surreal. It never stops being painful. It never stops being a reminder to live every day like it's your last and celebrate the beauty of life. Today I mourn all those lost and honor all those who risked their lives to save one life at a time." –Josh Gad

"20 years ago our great city, our country was attacked. Hate took almost 3,000 of our mothers, fathers, sisters, brothers, cousins, friends, loved ones. The horror and pain is alive every day, but particularly today. It's nearly impossible to believe it has been 20 years. Please keep all who lost someone that terrible day, in your hearts and prayers." –Debra Messing

"20 years ago today it happened. Something that seemed like it could only be fiction. Except it wasn't . It's hard to explain to someone who isn't Old enough how an entire country can be sad. To all that lost their lives, we salute and miss you. #NeverForget" –Bobby Bones

"Flying on 9/11, remembering all those folks who never got a chance to arrive at their destinations 20 years ago." –Kevin Smith

"9/11/2001 I was sitting on an AA flight 8am JFK to LAX when the captain said "there's been a fire @ the WTC, we're headed back to the gate to deplane". I'll never forget the panic, shock, despair & horror in the airport as people managed to call home & find out what was happening. They immediately shut down all the bridges and tunnels into the city so I stayed in Brooklyn that night at my dear friend Toure's. Like everyone else, we watched the footage over and over, speechless. I remember watching the smoke and dust clouds from Fort Greene helpless…..like it was another planet. The next few days, there was a huge overflow of people trying to volunteer and help. I already lived only 10 blocks from the towers, so I could get past the last checkpoint to volunteer without registering. I walked up and down the West Side Highway with a trolley cart of supplies and water and gave every last coat and sweatshirt I owned to emergency responders drenched in water, soot, etc… This obviously doesn't compare one billionth to what so many gave on that day. I feel some sort of need to observe the loss and sacrifice of an unfathomably horrid event but I still can't quantify it. What I do know is that it brought out the very best parts of the citizens of the greatest city in the world. For those who lost and sacrificed that day, you are forever in the souls and conscience of New Yorkers. Sending love to anyone still grappling with the tragedy of that day. We salute you." –Mark Ronson

"For all who perished, this quote from the wall of the #911Memorial asks us never to forget them. #911Anniversary #20YearsLater" –Marlee Matlin

"Twenty years on. We will never forget." –Hillary Clinton

"After Pearl Harbor, they invented a demon: Japanese Americans, who were falsely branded the enemy. I was among the 120,000 unjustly interned. After 9/11, they invented another demon: Iraq, which they attacked under false pretenses. Countless perished. We did not learn. I am here to remind us all that history exists and must be remembered, must be learned from. #remembering911" –George Takei

"20 years… Yes, it is a long time, but also an instant in the history of our species. Our duty, when we have life, is to remember the past, learn from it, honor it, but use it to reimagine the future." –Dan Rather

"Still hits the same every year. 20 years ago #neverforget Praying for all the families & hero's we lost that day" –Snooki

"20 Years. To the heroes we lost on 9/11, and to their families and loved ones, we remember and we honor you. Thank you for your courage that and every day after." –Russell Wilson

"20 years ago today america changed forever." –Kevin Sorbo

"Sending all my love to those we lost 20 years ago and their families who still mourn. Alongside all of the pain and loss we can also celebrate the many heroes who were born that day. Hold your loved ones a little tighter tonight. #NeverForget" –AJ McLean