Joaquin Phoenix returned to the scene of the crime last night appearing on "The Late Show With David Letterman". A year ago Phoenix has made a bizarre appearance on the show during the production of the mockumentary "I'm Still Here", directed by his brother-in-law Casey Affleck.

On Wednesday night an infinitely more handsome and groomed Phoenix apologized to Letterman for his behavior saying that it was simply a very elaborate piece of performance, which lasted two years.

Casey's mockumentary followed Phoenix's (fake) move from an Oscar nominated actor to a rap artist. The actor grew a beard, behaved in an aloof manner and shocked people in the mockumentary by appearing to do drugs and use call girls. Just a week after the film was released Casey revealed to the New York Times magazine that it was all a sham and none of his behavior or the movie are real.

In a tongue and cheek way Phoenix told Letterman on Wednesday night "You've interviewed many, many people and I assumed that you would know the difference between a character and a real person, so — but I apologize…I hope I didn't offend you in any way." On the contrary Letterman now wants payment for his involvement in the ruse.