This is how your favorite stars looked like in High School

Peter Dinklage

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Peter Dinklage went to an all-boys Catholic prep school where he started acting in the fifth grade. His wit, sense of humor, and talent propelled him right onto the stage of all of the school’s drama productions.

Mary-Kate Olsen

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Mary-Kate and twin sister Ashley have been involved in show business pretty much since they were born – they started acting at only nine months old on the wildly successful sitcom Full House.