Baio was born in Brooklyn, New York, the son of Rose and Mario Baio, a personal manager. His grandparents were immigrants from Italy. He attended Xaverian High School, and later graduated from North Hollywood High School. His other siblings as well as their cousin, Jimmy Baio, also act.

In 1976, Baio played the title character Bugsy Malone in the cult kiddie gangster musical directed by Alan Parker, which also co-starred Jodie Foster. Baio and Foster later worked together again in the 1980 teen girl drama Foxes helmed by Adrian Lyne. When he was 16, Scott was then cast as The Fonz's cousin, Chachi Arcola, on Happy Days. During his Happy Days run, Baio earned two Emmy Award nominations Read more...

Baio was a member of Young Americans for Freedom. He attended the historical ceremonies of the late U.S. President Ronald Reagan's widely-televised state funeral. The June 12, 2004, New York Daily News reported that Baio was seated near Margaret Thatcher and was quoted as saying: "President Reagan made me feel proud to be an American. Today, I feel sadness".

Baio is also famous for dating Read more...