Mary Lynn Rajskub is an American actress, comedienne and singer who is best known as a co-star of Kiefer Sutherland on the popular television series 24.

She was born Mary Lynn Rajskub on June 22, 1971, in Detroit, Michigan, into a family of Irish, Czech, and Polish ancestry. She was brought up in Trenton, Michigan. In 1989 she graduated from Trenton High School, then attended Detroit's College for Creative Studies, majoring in painting, before she transferred to the San Francisco Art Institute, graduating as a painter. She also studied music and acting, and for a few years she performed as a stand-up comedian at various clubs and restaurants. In 1995, Rajskub made her debut on television, she was cast by David Cross as one of the original cast members of Mr. Show with Bob and David. After her split from Cross, she left the show during its second season, and briefly took a job as a coffee brewer at Seattle's Best Coffee. In 1999 she joined the cast of 'Veronica's Closet' TV series, as Cloe, appearing in 15 episodes of the show.

As a skilled guitar player, Rajskub has been part of the comic duo called 'Girls Guitar Club' and appeared on the NBC's 'Late Friday' TV show. In the 2000s she has ventured into more dramatic roles, most notably her role as analyst Chloe O'Brian opposite Kiefer Sutherland on the popular TV series 24. She joined the show in 2003 at the beginning of the show's third season, then returned in the show's fourth season as a recurring cast member. Her character has been a hit with viewers and critics. Rajskub became a main cast member in the show's fifth season, then replaced Kim Raver as a female lead, with top billing second only to Kiefer Sutherland in the season of 2006 - 2007, until her character was arrested and skipped a few episodes in 2007.

While she has been mainly a television star, Rajskub also played bit parts on the big screen in Magnolia, Man on the Moon, Road Trip, among her other works. She offered mesmerizing performances in Mysterious Skin, Sweet Home Alabama, and in Punch-Drunk Love, then played a few more visible roles such as Janet Stone in Firewall, opposite Harrison Ford, and as Pam in Little Miss Sunshine. In 2006 Harrison Ford presented Rajskub with the Female Breakthrough Award for her "high concept comedic stage productions, as well as her TV and film acting skills." She was also nominated for the Screen Actors Guild Awards two times, in 2005, and in 2007.

Besides her work in film and on television, Mary Lynn Rajskub has been performing locally in Hollywood with her Girls Guitar Club show. Outside of her acting profession she is fond of art and is known as a regular visitor of LA's best museums, she also has been writing, painting and exhibiting her works at art shows and art auctions.

Mary Lynn Rajskub is currently residing in Los Angeles, California.
Part of the Girls Guitar Club comic duo. Formerly lived with composer/musician Jon Brion. Thanked in the liner notes of Fiona Apple's 1999 CD "When the Pawn..." Has played two different characters named "Chloe": on Veronica's Closet and on 24. Her last name is pronounced "Rice-Cub." Is a stand-up comedian, and performs at comedy clubs around L.A. 1989 Graduate of Trenton High School, Trenton, Michigan. Attended Detroit's College for Creative Studies, majoring in painting, before she transferred to the San Francisco Art Insitute. Is an avid and prolific painter. Owns a poodle named Claire. Is of Czech and Irish origin. Named her cockapoo "Emmy" after 24 won the award. Is currently performing a one woman show called "Complications of Purchasing a Poodle Pillow.". 24 co-creator and producer Joel Surnow created the role of Chloe for Mary Lynn after he saw her performance in Punch-Drunk Love. Wrote and starred in a short film called "The Hitman.". Has appeared in the third most number of 24 episodes, trailing only Kiefer Sutherland and Carlos Bernard. She auditioned for the part of Pam in The Office. The part was later given to Jenna Fischer. When the producers rebooted 24 after Day 3, she and Kiefer Sutherland were the only cast members to return as regulars in Day 4. Carlos Bernard, Reiko Aylesworth, and Dennis Haysbert returned during Day 4 as guest stars. She is thanked in the liner notes of Nina Gordon's 2000 CD "Tonight and the Rest of My Life". Is expecting her first child Summer 2008. Father is boyfriend, Matthew Rolph, a personal trainer.