As an actor, he has appeared on Louie, C.S.I., Comedy Bang Bang, Aqua Teen Hunger Force, and the film Division III: Football's Finest, and "Santa Clarita Diet" In 1996, Greg hosted the MTV game show Idiot Savants, which won a Cable Ace Award. He was a regular commentator on Vh1's Best Week Ever, I Love The series and Tough Crowd w/ Colin Quinn. In 2014 he starred in TruTV's How to Be a Grownup and became a recurring panelist on @midnight on Comedy Central.