Heather Christina Marie Matarazzo (born November 10, 1982) is an American actress. Her breakthrough role was Dawn Wiener in the film Welcome to the Dollhouse (1995). She played Lilly in The Princess Diaries (2001) and The Princess Diaries 2: Royal Engagement (2004). Her other films include The Devil's Advocate (1997), Scream 3 (2000), Sorority Boys (2002), Saved! (2004), and Scream (2022).