One of her childhood inspirations was the television series Moonlighting.
She later moved to Los Angeles, California, where she worked as a waitress in a Hard Rock Cafe and a ticket-taker at the Beverly Center movie theater.
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.
In 1996 she appeared in a music video for the song The Good Life by Weezer.
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.
She has an educational background as a painter, having attended the San Francisco Art Institute.
Rajskub has been nominated twice for a Screen Actors Guild Award; once in 2005, and again in 2007 for Outstanding Performance by an Ensemble in a Drama Series.
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.
She wasn’t out yet and I certainly wasn’t out and I kind of equate my growing up and sort of having more success in my career and then she was in a relationship and then we did meet later, but that was just kind of a messed up relationship, unfortunately.”Mary Lynn says her relationships with women have crept into pitch meetings for her comedy work, and that she’s aware of the lack of lesbian stories being told.“I did this series of little one-act plays that were about gay relationships, geared toward marriage issues and the producer said to me, ‘Yeah we need some lesbian stories! Unfortunately, a large part of the storyline was left on the cutting room floor.“When they cut a movie, they’re just trying to make the main story come together but I loved the relationship with Emily Blunt’s character and my character,” Mary Lynn said.
“It sort of wasn’t able to make it into the movie because it would have been a bigger side story, which is, I think she really was attracted to me and I was like straight up serious about her.
The picture of this girl and I, realizing I used to date her and I had blocked it out, shoved it into a black hole of my unconsciousness. Four years ago, when Mary Lynn played a lesbian character in she’d had “experiences” with women, but didn’t elaborate.