She's a regular on HBO in "The Larry Sanders Show," She's been in NBC's "Veronica's Closet," ABC's "The Secret Lives of Men, HBO's "Mr. Show," and UPN's "Shasta McNasty." Part of the cast of The Downer Channel.

From thedownerchannel.com:

"To me Mary Lynn is today's Lucille Ball because of her incredible range," says creator Michael Halpern. "She is completely elastic and present, both emotionally and physically."

Her Movies:
Dude, Where's My Car?
Road Trip
Magnolia
Sunset Strip
Man on the Moon