Steve Martin: Stephen Colbert inspired by Steve Martin to update a classic self-portrait

With help from three prominent artists, comedian Stephen Colbert retouched a self-portrait to please the discerning art collector eye of Steve Martin.

Martin was Colbert's guest Wednesday on the late-night satirical show "The Colbert Report," where he was promoting his new novel, "An Object of Beauty."

Colbert presented an old self-portrait and trotted out three unannounced guests to give their appraisal: artists Frank Stella, Shepard Fairey and Andres Serrano.

Fairey and Serrano added their own touches to the painting to depict Colbert as a fascist tyrant. Martin remained a reluctant buyer until Colbert added Martin's face to the painting, by which point Martin finally pronounced "Sold!"

Their interview went smoother than Martin's recent appearance at New York's 92nd Street Y, when interviewer Deborah Solomon was asked to talk less about art and more about Martin's career.