For McAdams and Seyfried, Mean Girls was the movie that launched their careers — and each had hits in 2018, Game Night and Mamma Mia!
The Mean Girls cast includes Rachel McAdams, Tina Fey, Amy Poehler, Lacey Chabert, Lizzy Caplan and Amanda Seyfried to name a few, all of which who are no stranger to starring in movies since the the 2004 cult classic.