@amandaseyfried/Twitter 1 / 14
@amandaseyfried/Twitter 1 / 14

On Wednesdays, they wear pink! Lindsay Lohan and Amanda Seyfried celebrated the 10th anniversary of the famed "Mean Girls" flick on April 30.

PHOTOS: Reunited co-stars!

The actress, who starred in the 2004 film as teenager Cady, took to Instagram to wish Tina Fey's hit film a happy birthday.

The OWN reality star posted a sketch from the scene where the male character Damian attends the school's all girls emergency meeting, shouting the classic line: "She doesn't even go here!" The 27-year-old captioned the pic: "He has a point #happybirthday #10years #MeanGirls."

PHOTOS: Lindsay Lohan's career through the years

Lohan's shout out follows former costar Seyfried's, who also sent the movie love. Seyfried, who played the not so sensible Karen, tweeted: "On Wednesdays we wear pink," along with a pic of her character.

PHOTOS: Funniest female stars

The actress is also using the anniversary for a good cause. Playing off one of the film's many catch phrases, "you can't sit with us," Seyfried posted a photo to her Instagram which read: "You can sit with us."

PHOTOS: Most romantic movies

Along with the photo, a caption read: "In honor of the 10 year anniversary of Mean Girls, I alongside @kindcampaign say to you, "You CAN sit with us." Repost this picture with the hashtag #youcansitwithus in an effort to bring an end to girl-against-girl bullying. #youcansitwithus #eventhoughyourenotwearingpink."

Happy Birthday, Mean -- and nice -- Girls!

MORE FROM WONDERWALL:

Hottest Pisces in Hollywood

Amazing celebrity career comebacks

Like us on Facebook?