Breakthrough role was in 1976 as the title child gangster in Bugsy Malone, opposite Jodie Foster
Was introduced in season 5 of Happy Days as Fonzie's cousin Chachi; when his spin-off, Joanie Loves Chachi, was cancelled after one season, he returned for the last season of Happy Days
Named one of TV Land's Top Ten Sexiest Men in 2005
Named No
18 on VH1's compilation of 100 Greatest Teen Stars
Wife Renee Sloan was a body double for Pamela Anderson, Baio's former girlfriend, on Baywatch