The actor, who passed away at 63, will forever be remembered for his inspiring and iconic movie and TV roles. And his films like Jack, Hook, and Mrs. Doubtfire will continually remind fans to stay young at heart.
Since many of the late great actor's films centered around children, we decided to honor him today by showing you how grown up his former costars are now.
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Click through the gallery to see then-and-now photos of the kids from Robin Williams's most beloved movies.
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Mario Yedidia played George in Jack.
He's 32 years old.
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Adam Zolotin played Louie in Jack.
He's 33 years old.
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Todd Bosley played Eddie in Jack.
He's 32 years old.
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Jeremy Lelliott played in Johnny Jack.
He's 34 years old.
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Bradley Pierce played Peter Shepherd in Jumanji.
He's 34 years old.
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Kirsten Dunst played Judy in Jumanji.
She's 34 years old.
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Amber Scott played Maggie Banning in Hook.
She's 32 years old.
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Gwyneth Paltrow played Young Wendy in Hook.
She's 44 years old.
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James Madio played the Lost Boy called "Don't Ask" in Hook.
He's 41 years old.
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Dante Basco played Rufio in Hook.
He's 41 years old.
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Isaiah Robinson played Pockets in Hook.
He's 33 years old.
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Jasen Fisher played Ace in Hook.
He's 36 years old.
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Raushan Hammond played Thud Butt in Hook.
He's 35 years old.
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Lindze Letherman played Grace Martin in Bicentennial Man.
She's 28 years old.
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Hallie Kate Eisenberg played Amanda Martin in Bicentennial Man.