Comic Martin MULL is an American actor, comedian, and singer-songwriter who has been active in the entertainment industry since the 1970s. He is best known for his roles in the television series Roseanne and Sabrina, the Teenage Witch, as well as his appearances in films such as Clue and Serial Mom. Steve Martin is an American actor, comedian, writer, producer, and musician who has been active in the entertainment industry since the 1970s. He is best known for his roles in films such as The Jerk, Parenthood, and Father of the Bride, as well as his stand-up comedy specials.