As tributes pour in for the comedic talent, who was found dead at his home on Monday, HELLO! looks back at a lifetime of laughs.
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The list of directors and actors he worked with reads like a Who's Who of Hollywood: Steven Spielberg, Gus Van Sant, Sally Field, Ben Affleck, Matt Damon, John Krasinski, John Travolta and Ben Stiller.
Yet, Robin with his manic, chaotic energy usually managed to steal the show. With his appearance on screen, viewers simply strapped themselves in and went along for the madcap ride.
He first attracted attention as the loveable alien in TV series Mork & Mindy, before going on to star in a host of films including Mrs Doubtfire, Good Morning Vietnam, Hook, Dead Poets Society and Good Will Hunting, for which Robin won an Oscar.