It's a strange feeling when someone like him passes away. You know they can't be around forever, but they've been around your whole life.
In Robin William's four decades in Hollywood he left an unforgettable mark on pop culture. Here are some of the big moments from his life and work:
1951 - Williams was born in Chicago, Illinois to mother Laura McClaurin and father Robert Fitzgerald Williams
1978 - appeared on Happy Days as the giddy alien Mork, which is then spun off to his own show Mork & Mindy with Pam Dawber
1978 - married his first wife Valerie Velardi
1981 - first appeared on The Tonight Show starring Johny Carson
1987 - won an Emmy for his performance in a variety show co-starring Whoopi Goldberg, Carol Burnett and Carl Reiner
1988 - nominated for his first Oscar for Good Morning Vietnam, playing an unorthodox and irreverent DJ
1989 - married his second wife, Marsha Graces
1990 - nominated for the Best Actor Oscar for his role as an inspirational teacher in Dead Poet's Society
1992 - received his third Oscar nomination for playing a homeless professor in The Fisher King
1993 - starred in the comedy Mrs. Doubtfire as a divorced man who dresses like a nanny so he can see his children
1995 - played a man trapped in a jungle board game in the children's film Jumanji
1996 - portrayed a gay nightclub owner who pretended to be straight alongside Nathan Lane in The Birdcage
1997 - won the Oscar for Best Supporting Actor for Good Will Hunting, playing a psychiatrist who helps a genius realize his potential
2002 - starred asa mentally unstable man in the dark drama One Hour Photo, a career turning moment
2006 - starred as President Teddy Roosevelt in Night at the Museum
2011 - married his third wife, Susan Schneider
2013 - returned to television as the star of The Crazy Ones opposite Sarah Michelle Gellar
2014 - returned to rehab to "focus on continued commitment to sobriety," his rep said
If you're dealing with difficult emotions, there is hope. The lifeline is here for anyone struggling >> call 1-800-273-8255 for the National Suicide Prevention Lifeline. You matter.