1. Rachel McAdams wore a blonde wig while filming the movie (made from your Mom's chest hair).
2. Amy Poehler who plays Mrs. George is only seven years older than her on screen daughter Rachel McAdams.
3. In the scene where Cady was asked if her "muffin was buttered", the line was originally going to be, "Is your cherry popped?"
The same goes for the girl who "made out with a hot dog," this was going to be "masturbated with a hot dog". These were taken out in order for the film to get a PG 13+ rating instead of an R
4. The scene in which Cady walks in on Jason and Gretchen kissing at her party is very different in the first draft of the script.
Originally, she walks in on Gretchen performing oral sex on Jason, but this was cut from the final print in order to achieve a PG-13 rating
5. In the scene where Christmas candy canes are being given out in the classroom, Damian, dressed in a Santa suit, reads out the name Glenn Coco - who is a REAL PERSON and a good friend of Tina Fey.
"I tried to use real names in writing because it's just easier." Said Tina in an interview. "My older brother's good friend is Glenn Cocco. He's a film editor in Los Angeles, and I imagine it's a pain in the butt for him. Someone said to me, you could buy a shirt at Target that says 'You go, Glenn Coco!' That was unexpected."
6. Lindsay Lohan and Rachel McAdams play characters who attend the same school and are in the same grade
Despite the fact there's an 8 year age difference between the two actresses
7. The business card that Kevin gives Cady says: 'KEVIN GNAPOOR MATH ENTHUSIAST/BAD-ASS M.C. 847-555-2148'
8. On August 13, 2013, the White House tweeted a photo of the Obamas' dog Bo holding a tennis ball in his mouth with the caption "Bo, stop trying to make fetch happen."
Therefore the President is basically a Mean Girls fanboy. Amazing.
9. Initially, Lindsay Lohan was cast as Regina, but decided to play the "nice girl" so the public wouldn't base her real personality on Regina's.
Rachel McAdams was chosen to play the "mean girl" because "only nice girls can play mean girls" according to the producer.
10. Amanda Seyfried was initially supposed to play Cady.
But producer Lorne Michaels thought she would be better as the "dumb girl".
11. Scarlett Johansson tested for the role of Karen...
...and Ashley Tisdale auditioned for Karen Smith. How different things could've been...
12. Tina Fey and Amy Poehler coached Rajiv Surendra on how to rap for his on-screen performance in the school's Winter Talent Show.
13. Tim Meadows broke his hand before shooting and had to wear a cast.
Which is why the explanation that his character Mr. Duvall had carpal tunnel was added.
14. Producer Tina Fey confessed that, when casting the film, she liked Jonathan Bennett (Aaron Samuels) because "he looked like Jimmy Fallon".
15. Tina Fey envisioned life backgrounds for all of the characters.
If any of the actors had questions about their characters she could fill in the blanks for them.
16. Mean Girls was the feature film debut for Amanda Seyfried.
17. And it was the feature film screenwriting debut for Tina Fey.
18. The movie 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 non-fiction parental self-help guide with no narrative.
19. The skirts for the Christmas talent show are made of plastic.
The costume designer says they were made of that fabric to "represent the Plastics".
20. Lacey Chabert was the first and only choice for the role of Gretchen.
THANK GOD.
21. Lizzy Caplan's character was named Janis Ian as an homage to musician Janis Ian, the first Saturday Night Live musical guest. Ian's song "At Seventeen" can be heard playing in the background when the girls are fighting at Regina's house.
The character of Janis is constantly bullied throughout the film and called a lesbian. The real Janis Ian was an out lesbian.
22. James Franco was considered for the role of Aaron Samuels, which was eventually given to Jonathan Bennett.
23. In the book that the film's based on, the most popular girl in a school is given the title "Queen Bee".
Regina means "queen" in Latin. NOT a coincidence.
24. The casting department searched through four cities to find the right actor to play Damian.
25. Cady gets very excited at the dance when she "actually recognizes" one of the songs being played. That song is "Built This Way" by Samantha Ronson.
Lindsay Lohan and Samantha Ronson confirmed they were dating about four years after the film was released.
SPOOKY.