The ultimate Mean Girls fan knows lots of cool facts about our favorite movie, like the alternate title was HomeSchooled, Amanda Seyfried originally auditioned for the role of Regina George and James Franco was considered to play Aaron Samuels (but we're kind of glad that fell through).
But can you infiltrate the Plastics without getting caught? How well do you know Mean Girls? Test your knowledge with this quiz, but warning: It's the hardest there is.
Mean Girls Quiz
Mean Girls Quiz
Good luck!
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Mean Girls star comes out to his own character (VIDEO)