Celebrities have been paying tribute to those who lost their lives on September 11, 2001, on the 15th anniversary of the terrorist attacks.
Stars including Victoria Beckham, Lady Gaga and Ryan Seacrest have all posted messages on Twitter.
Many have tweeted under the hashtag #NeverForget.
God Bless all the men and women who died in the attacks or fight to save lives during the Sept. 11 attacks #WeWillNeverForget #NewYorker
— Lady Gaga (@ladygaga) September 11, 2016
Never forget the lives lost. Never forget the first responders who charged toward danger. Never forget our unity and resolve. #neverforget
— Arnold (@Schwarzenegger) September 11, 2016
Life is so precious & I pray for everyone who was affected by this awful tragedy. #NeverForget911🇺🇸🗽 pic.twitter.com/7n8KKhWeKc
— Kim Kardashian West (@KimKardashian) September 11, 2016
“What separates us from the animals, what separates us from the chaos, is our ability to mourn people we’ve never met" #NeverForget15years
— Sarah Michelle (@SarahMGellar) September 11, 2016
Remembering the victims and their loved ones today. May God bless you, and this incredible city. #NeverForget 🙏🏾❤️ pic.twitter.com/nYLaWoJk1x
— Lewis Hamilton (@LewisHamilton) September 11, 2016
As a designer showing on tomorrow's important anniversary, I commemorate the victims of the September 11 attacks. pic.twitter.com/78yB6yeALn
— Victoria Beckham (@victoriabeckham) September 11, 2016
I will #neverforget this day 15 years ago. Reflecting on the absence but also remembering the strength and courage. pic.twitter.com/x4Gm6EyhYq
— Kourtney Kardashian (@kourtneykardash) September 11, 2016
9/11... We will not forget. https://t.co/w6AoIw80b2
— Vicky Pattison (@VickyPattison) September 11, 2016
#NeverForget Ever. pic.twitter.com/N4BMVO03CX
— Alyssa Milano (@Alyssa_Milano) September 11, 2016
remembering today and every day. Many thx to the heroes we lost and those who continue to keep us safe #September11 #NeverForget
— Ryan Seacrest (@RyanSeacrest) September 11, 2016
Can't believe it's been 15 years ... #NeverForget pic.twitter.com/qo1B4U1hT9
— Nathan Sykes (@NathanSykes) September 11, 2016
Nearly 3,000 people were killed when passenger jets hijacked by al Qaida terrorists struck the twin towers of the World Trade Centre in New York and the Pentagon outside Washington.
A fourth hijacked plane crashed into a field in Pennsylvania.
