Mean Girls is now available to watch for free on TikTok. Originally released in 2004, the teen comedy follows Lindsay Lohan as Cady Heron who, after being homeschooled in Africa, transfers to a public high school and is taken under the wing of the popular clique known as the Plastics, which includes Regina George (Rachel McAdams), Gretchen Wieners (Lacey Chabert), and Karen Smith (Amanda Seyfried). Having achieved cult classic status, Mean Girls has become a veritable pop culture phenomenon and one of the most quoted movies of all time.