"Mean Girls" is a 2004 teen comedy film directed by Mark Waters and written by Tina Fey. The film stars Lindsay Lohan as Cady Heron, a teenager who moves to the United States after being homeschooled in Africa. When she starts attending public high school for the first time, she befriends Janis (Lizzy Caplan) and Damian (Daniel Franzese) who introduce her to the social cliques of the school.

Cady soon encounters "The Plastics," a popular and exclusive group of girls led by the queen bee, Regina George (Rachel McAdams), along with her sidekicks Gretchen Wieners (Lacey Chabert) and Karen Smith (Amanda Seyfried). At Janis's urging, Cady infiltrates The Plastics to bring them down from the inside. However, as Cady gets deeper into the group, she finds herself adopting their mean-spirited behavior and struggling with her own identity.

The movie explores themes of high school social hierarchies, peer pressure, and the effects of bullying. It is widely praised for its sharp wit, memorable one-liners, and its satirical take on teenage life. "Mean Girls" has become a cult classic, celebrated for its humor and insightful commentary on the challenges of fitting in and staying true to oneself.