Friends of Robin Williams have been paying tribute to the Oscar winner, who was found dead overnight.
The star of much-loved films including Mrs Doubtfire and Good Morning, Vietnam had been struggling with severe depression in recent weeks.
In a statement, Robin Williams' wife, Susan Schneider, said she was "utterly heartbroken", while his friends have also been paying tribute.
Danny DeVito: 'Sad to think about this. Hard to speak. Hard to say. Hard to take. All I can think about is what a joy he was to be with. I'm devastated. I'm sending my love to his family and everyone who loved him. My heart is broken by this news.'
Steven Speielberg who worked with Robin on Hook: 'Robin was a lightning storm of comic genius and our laughter was the thunder that sustained him.'
Fellow comedian Jay Leno: 'I saw him on stage the very first time he auditioned at the improv in Los Angeles, and we have been friends ever since. It's a very sad day.'
Sally Field, Robin's co-star in Mrs Doubtfire released the following statement: 'I feel stunned and so sad about Robin. I'm sad for the world of comedy. And so very sad for his family. And I'm sad for Robin. He always lit up when he was able to make people laugh, and he made them laugh his whole life long.... tirelessly. He was one of a kind. There will not be another. Please God, let him now rest in peace.'
"Robin Williams was an airman, a doctor, a genie, a nanny ... and everything in between. But he was one of a kind." —President Obama
— Barack Obama (@BarackObama) August 12, 2014
Oh Robin...Our hearts are broken. Rest in peace darling. We loved you.
— Goldie Hawn (@goldiehawn) August 11, 2014
Very sad, very upset, very glad I did not have to hear about this though Twitter. Probably going to be taking some time off it for a while.
— Mara Wilson (@MaraWritesStuff) August 11, 2014
Genie, you're free. pic.twitter.com/WjA9QuuldD
— The Academy (@TheAcademy) August 12, 2014
The world lost a legend of an actor and an extraordinary man today. Rest In Peace Robin Williams.
— Johnny Depp (@J0HNNYDepp) August 11, 2014
I can’t believe the news about Robin Williams. He gave so much to so many people. I’m heartbroken.
— Ellen DeGeneres (@TheEllenShow) August 11, 2014
One of my all time favourites. Movies I grew up watching over and over again. A genius that will be so missed. R.I.P. Robin Williams.
— Harry Styles (@Harry_Styles) August 12, 2014
Got to chat with the supremely talented legend, Robin Williams, on the set of NATM3. What a kind, charming, brilliant man x
— Rebel Wilson (@RebelWilson) August 12, 2014
The world just got a lot less funny. Robin Williams is a tragic loss.
— Seth MacFarlane (@SethMacFarlane) August 12, 2014
Robin was as sweet a man as he was funny. If you're sad, please tell someone.
— Jimmy Kimmel (@jimmykimmel) August 11, 2014
Can't believe it! What a talented, hilarious man! Loved him since I was a kid!! Thoughts are with… http://t.co/xpkj2CpJK9
— Niall Horan (@NiallOfficial) August 12, 2014
A tweet cannot begin to describe the hugeness of Robin Williams heart and soul and talent. This is so sad. #RobinWilliams
— Ben Stiller (@RedHourBen) August 12, 2014
OK, I’ll try. I met him when I was 13 and a huge fan and he was so kind and I watched him be kind to every fan i ever saw him with...
— Ben Stiller (@RedHourBen) August 12, 2014
And with other actors he was so generous and brilliant. He made everyone feel special and equal around him even though he was the genius...
— Ben Stiller (@RedHourBen) August 12, 2014
His heart was so big and even if you didn’t know him, what he gave everyone was that same spirit in his work, so we all felt it…
— Ben Stiller (@RedHourBen) August 12, 2014
His impact on the world was so positive. He did so much good for people. He made me and so many people laugh so hard for a very long time.
— Ben Stiller (@RedHourBen) August 12, 2014