Actor Robin Williams has been found dead in what police said was a suspected suicide at his home in California.
Williams, 63, known for films such as Good Morning, Vietnam and Mrs Doubtfire, had been grappling with severe depression recently, according to his press representative.
In a statement 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."
Gallery: Robin Williams - A life in pictures
Mara Buxbaum, Williams' press representative, said: "Robin Williams passed away this morning. 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."
A Marin County Sheriff's Office statement said: "At this time, the Sheriff's Office Coroner Division suspects the death to be a suicide ... but a comprehensive investigation must be completed before a final determination is made."
It added that an investigation into the "cause, manner, and circumstances of the death is currently under way".
A forensic examination is expected to take place today, with toxicology tests to take place later.
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