Mean Girls is a 2004 American teen comedy-drama film directed by Mark Waters. The screenplay was written by Tina Fey and is 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 is produced by Saturday Night Live creator Lorne Michaels. Screenwriter and co-star of the film, Tina Fey, was a longtime castmember and writer for SNL. The film also features appearances from SNL cast members Tim Meadows, Ana Gasteyer and Amy Poehler. The film was generally well-received by critics and was a box office success, grossing $129,042,871 worldwide. Mean Girls has been praised as Lohan's break-out film role. Mean Moms, a quasi-spin-off, based on Wiseman's second book, Queen Bee Moms & King Pin Dads, is also in development. Cady Heron ...