He has appeared on The Tonight Show, Late Night with Conan O'Brien, and The Nanny. He has had his own half hour special on Comedy Central. Gregg tours nationally as a headliner at colleges, corporate and charity events. He also performs in Europe, where he has appeared on several popular television programs. He recently completed a documentary with the BBC in association with Comedy Central, and in 2005 was one of the featured performers in the critically acclaimed film "The Aristocrats." He is a regular performer at New York City's Comedy Cellar.