Greg Fitzsimmons is a stand-up comedian and a regular guest on The Howard Stern Show, Chelsea Lately, The Adam Carolla Show, and The Joe Rogan Experience. His 2011 book, Dear Mrs. Fitzsimmons received critical praise from NPR and Vanity Fair.

Since 2006, Greg has hosted a radio show on Howard Stern’s Sirius/XM channel and his own twice-weekly podcast, Fitzdog Radio. A regular on Letterman, Conan, and Kimmel, Greg also had two stand-up specials on Comedy Central and spent five years as a panelist on VH1’s Best Week Ever.