Mary Lynn Rajskub (; born June 22, 1971) is an American actress and comedian who is best known for portraying Chloe O'Brian in the action thriller series 24, and the character Gail the Snail in It's Always Sunny in Philadelphia. Rajskub was a regular cast member on HBO's Mr. Show with Bob and David, and she has appeared in such films as Dude, Where's My Car?, Sweet Home Alabama, Punch-Drunk Love, Mysterious Skin, Little Miss Sunshine, Sunshine Cleaning, Safety Not Guaranteed, and The Kings of Summer, among others. Early life Rajskub was raised in Trenton, Michigan, having moved there from Detroit. She is the daughter of Betty and Tony Rajskub and has two older sisters. Rajskub played the clarinet in a school band and portrayed Frenchie in the musical Grease. One of her childhood inspirations was the television series Moonlighting. During the early nineties, she often performed at various open mics in San Francisco. She later moved to Los Angeles working as a waitress in a Hard Rock Cafe and a ticket-taker at the Beverly Center movie theater. Career Rajskub's first part was as an Oompa-Loompa in a community theater production of Willy Wonka & the Chocolate Factory, and her first starring role was Raggedy Ann. In 1996 she appeared in music videos for the songs "The Good Life" by Weezer and "The New Pollution" by Beck. Rajskub was one of the original cast members of Mr. Show with Bob and David. From 1996–1998, she had a recurring role on the HBO series The Larry Sanders Show as booking assistant Mary Lou Collins. Her most notable role is CTU systems analyst Chloe O'Brian on 24, which she joined in 2003 at the start of the show's third season. Her character was a hit with viewers and critics and was one of the few cast members to return in the show's fourth season. After being a regular guest star for two seasons, Rajskub became a main cast member in the show's fifth season. By the end of the series, she was the lead female, with top billing second only to Kiefer Sutherland. Her character also had the honor of saying the final words of the series in the season 8 series finale. Rajskub and Sutherland appeared briefly as their 24 characters in a 2007 episode, "24 Minutes", of the Fox animated series The Simpsons. In August 2013, it was announced that