Claim: An American stand-up comedian, screenwriter and actor who created the false persona "Marty Power", became famous for his role in the Scream film series but was nominated for Worst Actor for his performance in Son of the Mask., was Jamie Kennedy.
Evidence: James Harvey Kennedy (born May 25, 1970) is an American stand-up comedian, television producer, screenwriter, and actor. Kennedy created a false persona, screen agent "Marty Power", to attract the attention of real agents and managers over the phone, who would later book his performances. He is best known for playing Randy Meeks in the Scream franchise (1996-2000) and playing various characters in The Jamie Kennedy Experiment (2002-2004) on The WB. His lead role as Tim Avery in Son of the Mask earned him a Golden Raspberry Award nomination for Worst Actor.