Mean Girlsis back in theaters. But it's not so much a remake of the 2004 comedy that made "fetch" happen (sort of). It's a movie musical inspired by the Broadway show based on the movie, which Tina Fey wrote after reading Rosalind Wiseman's 2002 parenting book, Queen Bees and Wannabes. Not only will audiences get to see the re-enactment of beloved catchphrases about do's ("On Wednesdays, we wear pink!), don'ts (Mathletes is "social suicide"), and dates (October 3rd!). They'll also get to see Reneé Rapp, Angourie Rice, Avantika, and Auli'i Cravalho sing out the lots of feelings their characters have in this high school comedy.