Heather Matarazzo (born November 10, 1982 in Long Island, New York, USA) is an American actress. Her breakthrough role was as a geeky girl in the movie Welcome to the Dollhouse. Her other movies include Sorority Boys, Scream 3, and Saved!. Beside Dollhouse, she's best known for her role as Lilly in The Princess Diaries and The Princess Diaries 2: Royal Engagement. Matarazzo is often typecast as geeky, best friend, or sidekick characters, as exemplified by her roles in Diaries, Dollhouse, Sorority, and Saved!
In August 2004, Matarazzo came out as a lesbian. She's been in a relationship since 2003. In April 2005, she was a speaker at the Gay, Lesbian and Straight Education Network conference in Boston.