- #Mofo - The offical website for the Penn & Teller Fan Chat Channel.
- A.V. Club - Interview (Part 1) [Stephen Thompson] (June 1998)
- A.V. Club - Interview (Part 2) [Stephen Thompson] (June 1998)
- AskMen.com - bio, photo and interview
- GreenCine - Interview
- IGN FilmForce - 10 Questions with Penn Jillette
- Internet Broadway Database
- SuicideGirls - Interview [Daniel Robert Epstein] (August 2005)
- The Actors Compendium
- Who's Dated Who?