Scott Vincent James Baio was born on September 22, 1961 in Brooklyn, New York. He was the third child of Mario and Rose Baio, who had emigrated from Italy. At the young age of nine, Scott decided that he wanted to be an actor. Soon after, his parents took him on interviews and he was able to land small roles in commercials.

His first real taste of success occurred in 1976 when he beat out 2,000 other child actors for the starring role in the child gangster film Bugsy Malone. The following year, Scott's popularity soared after he was chosen for the role of Chachi, Fonzi's cousin, on the ABC hit sitcom, Happy Days. Soon after, Scott's parents moved him to Hollywood to help him keep up with the demands of his acting career. Throughout his stint on Happy Days from 1977 to 1984, Scott still managed to appear in several films, including Skatetown, U.S.A. and Zapped! and even starred in three other short-lived sitcoms (Blansky's Beauties, Who's Watching the Kids, and the Happy Days spin-off Joanie Loves Chachi). This exposure helped him become a major teen idol in the early 1980s.

After Happy Days went off the air in 1984, Scott moved to CBS where he was given the starring role on the sitcom Charles in Charge. He played a college student who was hired to watch over three children. After one season on CBS, the show was retooled and moved to first-run syndication where it ran successfully from 1987 to 1990.

Since Charles in Charge ended, Scott has been able to stay busy, albeit with a relatively lower profile. He's had starring roles on Baby Talk and Diagnosis Murder and guest starring roles on Veronica's Closet and Arrested Development. He has even tried his hand behind the camera, directing episodes of The Wayans Bros. and Unhappily Ever After.

Offscreen, Scott has made a few headlines as well. In 1997, he was rumored to have died in a car accident, but this was quickly declared as false. He has gained a reputation for dating several high-profile (mostly blonde) actresses, most notably Pamela Anderson , Heather Locklear and former co-star Nicole Eggert. He now lives in Southern California.
In the fall of 1998 he starred in a show called "Rewind" which had been picked up by FOX. However, the network cancelled the show before a single episode made it to air. False rumors abounded that Scott had been killed in a car crash. Nothing was ever confirmed as to how the story got started. Scott had not even been in an accident, much less hurt. [18 December 1997] Cousin of actor Jimmy Baio and Joey Baio. Inducted into The Man Show Hall of Fame for his reputation of dating women such as Brooke Shields and Pamela Anderson. Dated Pamela Anderson, Erika Eleniak, Nicole Eggert, Natalie Raitano, Nicollette Sheridan, Brooke Shields and Heather Locklear. Brother of actor Steven Baio. Attended Xaverian High School, in Bay Ridge, Brooklyn, New York. Born on the same day as actresses Bonnie Hunt and Catherine Oxenberg. Ranked #16 in TV Guide's list of "TV's 25 Greatest Teen Idols" (23 January 2005 issue). Is a first-generation American. His parents, Mario and Rose Baio, both emigrated to the U.S. from Italy. Attended Saint Bernadette Elementary School in Dyker Heights, Brooklyn, New York. Was engaged to graduate student Janette Jonasson as of July 18, 2001, but has since broken off the engagement.