A native of Geneva, New York, St. Claire is one of four children born to former stage actress Peggy Lambert.
[1] In 1982 she debuted on the NBC television series Silver Spoons, portraying Ricky Schroder's girlfriend, which led to numerous guest appearances and film roles,[citation needed] including Sid & Nancy (1986).
Following high school, she spent a year attending the American Academy of Dramatic Arts (West) in Pasadena on a scholarship.
[1] In 1987 she was nominated for "Exceptional Performance by a Young Actress, Guest Starring in a Television, Comedy or Drama Series" for a 1986 appearance on The Judge.
She is a member of the Hollywood Knights celebrity basketball team hall of fame and has been credited as "Julie Capone".