Tributes have been paid to Robin Williams, the iconic actor and comedian, who has passed away at the age of 63.
Robin Williams was found dead at his home in Northern California.
In a statement, the late star's representatives said: "Robin Williams passed away this morning [Monday]. He has been battling severe depression of late.
"This is a tragic and sudden loss. The family respectfully asks for their privacy as they grieve during this very difficult time."
His wife, Susan Schneider, said: "This morning, I lost my husband and my best friend, while the world lost one of its most beloved artists and beautiful human beings. I am utterly heartbroken. On behalf of Robin's family, we are asking for privacy during our time of profound grief.
"As he is remembered, it is our hope the focus will not be on Robin's death, but on the countless moments of joy and laughter he gave to millions."
Robin Williams had three children from his previous marriages.
An incomparable talent, Robin Williams came to worldwide fame through the 1970s extra-terrestrial comedy series Mork & Mindy.
He went on to become a touchstone performer for generations of film, television and comedy fans, who could work across the genres and leave a lasting impression in all of them.
Among his many film credits were: The World According to Garp, Moscow on the Hudson, Good Morning Vietnam, Dead Poets Society, Awakenings, The Fisher King, Hook, Aladdin, Mrs Doubtfire, Jumanji, an Oscar-winning performance in Good Will Hunting, Patch Adams, One-Hour Photo, Insomnia, Night at the Museum and Happy Feet.
The Juilliard-trained actor's stage credits included Waiting for Godot and Bengal Tiger at the Baghdad Zoo.
Paying tribute, US President Barack Obama said: "Robin Williams was an airman, a doctor, a genie, a nanny, a president, a professor, a bangarang Peter Pan, and everything in between.
"But he was one of a kind. He arrived in our lives as an alien – but he ended up touching every element of the human spirit."
President Obama continued: "He made us laugh. He made us cry. He gave his immeasurable talent freely and generously to those who needed it most – from our troops stationed abroad to the marginalized on our own streets.
"The Obama family offers our condolences to Robin's family, his friends, and everyone who found their voice and their verse thanks to Robin Williams."
I could not be more stunned by the loss of Robin Williams, mensch, great talent, acting partner, genuine soul.— Steve Martin (@SteveMartinToGo) August 11, 2014
Heartbroken. Robin Williams was one of the brightest, most loving & wonderful people I've ever been blessed to know. We'll miss you.— Monica Potter (@monicapotter) August 11, 2014
Robin was a deeply kind and utterly magical person. This horrendous news is nearly impossible to accept. He did not deserve this fate.— mark romanek (@markromanek) August 12, 2014
We saw Robin Williams perform unannounced at comedy clubs in LA. His talent was breathtaking & I have never seen such love from an audience.— David Walliams (@davidwalliams) August 12, 2014
Well, that is a proper gut-punch of news to wake up to. What a loss Robin Williams is.— Dara Ó Briain (@daraobriain) August 12, 2014
bless robin williams family. One of the most supportive sweetest men i knew. Rare. brilliant, trailblazer w/the heart & humility of a rookie— kathy najimy (@kathynajimy) August 12, 2014
The world has lost a great genius and San Francisco has lost a loyal friend. http://t.co/J2Bkr715Ne— Nancy Pelosi (@NancyPelosi) August 12, 2014
RIP Robin Williams...one of the best actors/comedians of all time. You will always be remembered. ?? pic.twitter.com/8znmU0mgQP— Macklemore (@BestMackleMore) August 12, 2014
The world just got a lot less funny. Robin Williams is a tragic loss.— Seth MacFarlane (@SethMacFarlane) August 12, 2014
Oh dear God. The wonderful Robin Williams has gone.— Bette Midler (@BetteMidler) August 12, 2014
#RobinWilliams was simply the World's most beloved comedian since Chaplin.— Rob Schneider (@RobSchneider) August 12, 2014
Robin Williams's passing is a tragedy--Enormously talented, a revolutionary comedian and tremendous actor. I... http://t.co/vTDjgDKnyK— John Carpenter (@TheHorrorMaster) August 12, 2014