Academy Award-winning actor and comedian Robin Williams has died at 63. The cause of death is thought to be suicide by asphyxiation.

A woman cartwheels through the Coachella Valley Music and Arts Festival in Indio, California April 10, 2015. (Photo by Lucy Nicholson/Reuters)

The moon shines through trees at a United Nations displacement camp at dusk on March 14, 2011 in Ras Jdir, Tunisia. (Photo by Dan Kitwood/Getty Images)

A model walks the runway during the Craig Lawrence show at London Fashion Week Autumn/Winter 2012 at Somerset House on February 19, 2012 in London, England. (Photo by Stuart Wilson/Getty Images)

DJ Deadmau5 arrives at Spike TV's “2011 Video Game Awards” at Sony Studios on December 10, 2011 in Los Angeles, California. (Photo by Christopher Polk/Getty Images)

Rosanna Davison attends the “Lambertz Monday Night” at Alter Wartesaal on February 1, 2012 in Cologne, Germany. (Photo by Andreas Rentz/Getty Images)

An Anti-Capitalist protestor from the Occupy LSX movement at St. Paul's Cathedral on February 22, 2012 in London, England. (Photo by Matthew Lloyd/Getty Images)