Mean Girls is a 2004 American/Canadian teen comedy film, directed by Mark Waters. The screenplay was written by Tina Fey and based in part on the non-fiction book Queen Bees and Wannabes by Rosalind Wiseman, which describes how female high school social cliques operate, and the effect they can have on girls. The film stars Lindsay Lohan and features a supporting cast of Rachel McAdams, Amanda Seyfried, Lacey Chabert, and Lizzy Caplan. The film also features several Saturday Night Live cast members, including Tina Fey, Tim Meadows, Ana Gasteyer, and Amy Poehler. Described by director Mark Waters as "Clueless meets Heathers", Mean Girls follows the home-schooled 16-year-old Cady Heron (Lohan) as she enters her first year of public high school. The film was generally well received by critics and was a big financial success, grossing $129,042,871 worldwide. Mean Girls has been praised as Lohan's break-out film role. A sequel, Mean Girls 2, is currently in production. Mean Moms, a quasi...