Heather Matarazzo was born November 10, 1982, in Oyster Bay, New York. She was adopted by Camille and Ray Matarazzo, an Italian-American couple although she is of Irish descent biologically. Heather attended both Oyster Bay High School and Long Island High School for the Arts. In 1997, she made her film debut in Welcome to the Dollhouse (1995), she played the lead role of Dawn Wiener a shy, unattractive, unpopular 7th grader who falls for a charismatic and handsome aspiring rock musician, and decides to pursue him romantically. She won an Independent Spirit Award for her performance in the film.