Topnotch actor and comedian Robin Williams was found dead, aged 63, in an apparent suicide in his San Francisco home. His bereaved wife, Susan Schneider was utterly heartbroken over her husband's sudden death.

He leaves behind his third wife Susan Schneider and three children. He has a son, Zachary Pym, with his first wife Valerie Velardi, and two children, Zelda Rae and Cody Alan, from his second marriage to Marsha Garces.

The cause of his death is still unknown, but it was reported that he died of asphyxia.

"He has been battling severe depression of late," his media representative Mara Buxbaum told CNN. "This is a tragic and sudden loss. The family respectfully asks for their privacy as they grieve during this very difficult time."

In a statement, Williams' wife, Susan Schneider, said she was "utterly heartbroken".

"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 married graphic designer Susan Schneider at the Meadowood Resort in Napa Valley, California, in October 2011. They had been living in Williams' home in Sea Cliff, in San Francisco.

According to US Weekly, the pair had been dating for just less than four years. They met shortly before Robin Williams underwent heart surgery in mid-2009, after which Susan Schneider nursed him back to health at his home.

In April 2010, the couple attended the Academy Awards together.

"Yes, there's a person. Very lovely, and it's been very nice and very quiet," he told USA Today.

"Her name is Susan Schneider. Very sweet. Good peeps."

In the days leading up to her wedding, bride Susan Schneider told the San Francisco Chronicle she was "so excited and so thrilled" for her big day.

Susan Schneider is the principal of graphic design firm Critical Eye Design, founded in 1997. She studied at the California College of the Arts in San Francisco and she is utterly heartbroken of her husband's tragic loss.