Scott Vincent James Baio (/ˈbeɪ.oʊ/; born September 22, 1960) is an American actor and television director, best known for his roles as Chachi Arcola on the sitcom Happy Days and its spin-off Joanie Loves Chachi, the titular character on the sitcom Charles in Charge, the main character in the musical Bugsy Malone, and for his role as Dr.