The best friend in The Princess Diaries is played by Heather Matarazzo as Lilly Moscovitz.
Lilly is Mia Thermopolis's (Anne Hathaway) best friend and confidante. She is a quirky, intelligent, and loyal friend who helps Mia navigate the challenges of becoming a princess. Lilly is a popular character who is known for her wit, her love of fashion, and her unwavering support for Mia.
Heather Matarazzo's performance as Lilly Moscovitz is widely praised, and she is considered one of the most memorable characters in the film.
