Mean Girls is a 2004 American teen comedy film directed by Mark Waters, and written by Tina Fey. The film stars Lindsay Lohan, Rachel McAdams, Tim Meadows, Ana Gasteyer, Amy Poehler and Fey. It is based in part on Rosalind Wiseman's 2002 non-fiction self-help book, Queen Bees and Wannabes, which describes female high school social cliques and the damaging effects they can have on girls. Fey also drew from her own experience at Upper Darby High School as an inspiration for some of the concepts in the film. The film introduced Amanda Seyfried in her film debut.