Lilly Moscovitz is Mia's best friend and Michael's younger sister. Lilly seems to be very self-centered. She is very caught up in the cause of not allowing the school administration to control the students.
Lilly has her own local access TV show. As part of her stand against the administration, Lilly stages a walkout during one of the school days. Lilly has a long-term boyfriend, Boris. Lilly, along with their friend Tina, are responsible for telling Michael how Mia feels about him and getting the two of them together.