<P> Peter Costa is a former American child actor . Costa is best known for his many appearances on The Cosby Show, playing Rudy Huxtable's chubby friend Peter Chiara, whose signature trait was running out the door when a scary or disastrous situation occurs in the Huxtable house...</P> <P> 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 . </P>

Who played rudy's friend peter on the cosby show