Worked as an NBC tour guide in New York

Met his future mentor David Letterman, who was taking his mother on a tour of the studios; offered Letterman the children's admission price

Hired as an office boy for "Late Night With David Letterman"

Became a staff writer for "Late Night With David Letterman"

Began writing and acting in his own sketches on "Late Night With David Letterman"

Feature acting debut, Michael Mann's "Manhunter"

First TV guest spot, "The Equalizer" (CBS)

Wrote and starred in "Action Family", a "Cinemax Comedy Experiment"

Executive produced "Chris Elliott's FDR--A One-Man Show", a "Cinemax Comedy Experiment"; also wrote and starred

Cast as a recurring character on "Nick & Hilary", an NBC sitcom remake of "Tattingers"

Played a robber in "Life Without Zoe", the Francis Ford Coppola-directed segment of "New York Stories"

Had a featured role in James Cameron's underwater actioner "The Abyss"

Served as creator, producer, writer, and star of the Fox sitcom "Get a Life!"

First substantial feature supporting role playing a sarcastic news cameraman in the Harold Ramis comedy "Groundhog Day"

Played "rockumentarian" A. White in the gangsta rap send-up "CB4"

First feature as star, "Cabin Boy"; also wrote story; Letterman had cameo role

Was a regular on "Saturday Night Live" (NBC)

Guest starred on episodes of "Murphy Brown" (CBS) and "The Simpsons" (Fox)

Joined cast of the NBC sitcom "The Naked Truth"

Had a memorable supporting role as Dom, a man plagued with a nervous skin condition and a jones for the titular dream girl, in "There's Something About Mary"

Voiced the character of Dogbert in the UPN animated series "Dilbert"

Co-starred in the surprise hit family comedy feature "Snow Day"

Had featured role in the NBC sitcom "The Weber Show/Cursed"