18. EMMY ROSSUM

Films: Genius (1999)

In the Disney Channel original movie, Rossum played Claire Addison, a sweet and smart high school girl who tutors a boy wonder who was actually already smart enough to get into college before he turned 14. Nowadays, the innocent and oblivious side of Rossum has been cast off as she faces a more daring role in Showtime’s edgy comedy/drama series, Shameless.