Mean Girls fans know October 3rd is the movie's unofficial holiday. In the movie, Aaron Samuels (Jonathan Bennett) asks Cady Heron (Lindsay Lohan) if she knows what day it is. "It's October 3," she replies.
Ever since, cast-members and fans have turned the day into a cause for celebration, being nice and binge-watching the classic.
15 years after the movie's release, Bennett and cast-mates are asking fans to donate $3 to the Thirst Project, which will help build a well in Uganda and bring safe drinking water to a village.
"So, we all know Cady was from Africa," Lohan says in an Instagram video shared Thursday. "But this year, we want to help with building a well in Uganda."
Amanda Seyfried, who plays Karen Smith, says "that well will bring fresh drinking water to nearly 500 people for the rest of their lives."
Lacey Chabert (Gretchen Wieners), Daniel Franzese (Damian), Lizzy Caplan (Janis Ian), Rajiv Surendra(Kevin Gnapoor), Jan Caruana (Emma Gerber) and Stefanie Drummond (Bethany Byrd) also showed support for the initiative.
Meanwhile, cast-member Tina Fey and super-fan Busy Philipps hosted a special live-stream screening of the movie on Facebook in partnership with Paramount Pictures and the Broadway adaptation of the film.