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Peter Costa is a former American child actor. Costa is best known for his many appearances on The Cosby Show, playing Rudy Huxtable's young friend Peter Chiara.
In 1987, Costa was nominated for a Young Artist Award, "Exceptional Performance by a Young Actor in a Long Running Series Comedy or Drama", for the role.
He made his first feature film appearance in the 1984 film The Flamingo Kid.
Costa made only one appearance on screen after The Cosby Show, in a small role in the 1990 film The Lemon Sisters.