Regina George is a fictional character from the 2004 film Mean Girls, portrayed by actress Rachel McAdams. She is the leader of a popular high school clique known as the Plastics. Regina is characterized by her confidence, beauty, and manipulative behavior, often using her social status to control others. In the film, Regina's actions and personality highlight themes of bullying and the complexities of teenage social dynamics. Her character serves as both a villain and a cautionary example of the pressures of fitting in and the consequences of superficial relationships in high school.