James Franco has taken on one of his most mainstream roles in the new Disney film, 'Oz the Great and Powerful'; nothing is more mainstream than Disney. (You can read my review here.) But his entire career still has the shape of wide-ranging performance art -- and with a lot more focus, Stephen Colbert's on-screen right-wing persona has so overshadowed the "real" Colbert that the character can be considered one of the most successful, long-running pieces of performance art of all time. So consider the many layers of reality and artifice when Colbert asks Franco, the professor-filmmaker-writer-actor-whatever: "Are you a fraud?"
In this 'Colbert Report' interview, they also talk about 'Oz,' and Franco challenges Colbert on J.R.R.Tolkien trivia. I could have listened to them for a long longer.