1. Lindsay Lohan was originally cast as Regina, but end up cast as the “nice girl” Cady so the public wouldn’t base her real personality on Regina’s.
2. On that note, Amanda Seyfried was initially supposed to play Cady.
3. Lacey Chabert, who played Gretchen Weiners, was the voice of Eliza Thornberry.
She also did the voice of Meg on “Family Guy” for the first season and a half of the show, before Mila Kunis took over.
4. Ashley Tisdale auditioned for Karen Smith.
5. In real life, Rachel McAdams is eight years older than Lindsay Lohan, who plays her classmate, and only seven years younger than Amy Poehler, who plays her mother.
7. Tim Meadows broke his hand before shooting, so his character’s carpal tunnel was added to explain it into the film.
8. Also, during the above scene, Tim Meadows’ character says, “I did not leave the South Side for this!” This is actually a quote from another movie called Lean on Me, which is “about a principal struggling to improve a decaying school.”
9. Rachel McAdams’ hair was a wig.
10. GLENN COCO IS AN ACTUAL PERSON! He’s David Reale, a Canadian actor born 1984. For some horrible, horrible reason this role was not credited in the movie.
11. This is what the business card that Kevin G. gives Cady actually says:
And yes, 847 is the real area code of the North Shore.
12. The scene where Cady is asked if her “muffin was buttered” originally had her being asked, “Is your cherry popped?” This was changed to get a PG-13 rating.
The same with the line about the girl who “made out with a hot dog.” This was originally going to be “masturbated with a hot dog.”
13. The song Cady “actually recognizes” at the school dance is called “Built This Way” by Samantha Ronson. Lindsay Lohan would go on to date Ronson four years after the movie’s release.
14. Yeah, there’s a Mean Girls video game.
It’s a “single-player puzzle game and allows the player to combine similarly coloured jewels, shoes and lipstick. Chain combinations together and you can unleash rumours, pranks and put-downs.”
15. The Plastics wear skirts made out of plastic for the winter talent show in order to “represent the Plastics.”
16. Mean Girls is based on the book Queen Bees and Wannabes: Helping Your Daughter Survive Cliques, Gossip, Boyfriends, and Other Realities of Adolescence by Rosalind Wiseman.
… even though it’s a nonfiction parental self-help guide with no narrative at all.
17. Janis Ian, Lizzy Caplan’s character, is named after Janis Ian, the first Saturday Night Live musical guest.
In the movie, Janis is called a lesbian by bullies when in real life Janis Ian is an out lesbian.