Veteran film and television comedic actor Robin Williams was found dead on Monday. He was 63.

The cause of death is believed to be suicide via asphyxiation, according to the coroner’s office in Tiburon, Calif. He was found in his home.

Williams is best known for both comedic and dramatic roles in movies including “Good Will Hunting,” for which he won a Best Supporting Actor in 1997. In addition, he won several Emmys, Golden Globes.

Williams’ film career was bookended by TV roles including his breakout role on the ABC sitcom “Mork & Mindy” in 1978. He returned to TV on CBS last season, “The Crazy Ones.”