Scott Baio

Scott Vincent James Baio is an American actor and television director. He is known for his role as Chachi Arcola on the sitcom Happy Days and its spin-off Joanie Loves Chachi, as well as the title character on the sitcom Charles in Charge, Dr. Jack Stewart in the medical-mystery-drama series Diagnosis: Murder, and the titular hero of the musical film Bugsy Malone, his onscreen debut.