Amanda Seyfried is iconic for playing Karen, but the role could’ve gone to Blake Lively.

The newMean Girlsfilm isa hit at the box office.

1.Lindsay Lohaninitially wanted to play Regina.

Screenshot from "Mean Girls"

2.Similarly,Rachel McAdams, who played Regina, first auditioned to play Cady.

4.Rajiv Surendra, who played Kevin G, auditioned for Damian.

5.Mean Girlswas Amanda Seyfried’s first movie.

Screenshot from "Mean Girls"

6.In an alternate world, though,Blake Livelywould’ve played Amanda’s character, Karen.

8.Regina’s dig to Cady, “So you agree?

You think you’re really pretty?”

Screenshot from "Mean Girls"

was inspired by an experience Tina Fey actually had as a teenager.

12.Rachel McAdams’s Juicy Couture tracksuit in the film was stuffed with toilet paper.

13.The costume designer intentionally dressed The Plastics…in plastic.

Screenshot from "Mean Girls"

He’s a childhood friend ofTina Fey’s brother.

Screenshot from "Mean Girls"

Screenshot from "Mean Girls"

Screenshot from "Mean Girls"

Screenshot from "Mean Girls"

Behind the scenes of "Mean Girls"

Screenshot from "Mean Girls"

Screenshot from "Mean Girls"

Screenshot from "Mean Girls"

Screenshot from "Mean Girls"

Screenshot from "Mean Girls"

Screenshot from "Mean Girls"