James Franco: Such a Fan of 'The Voice'!

James Franco keeps it cool while signing autographs after making an appearance on the Late Show With David Letterman on Monday (October 14) in New York City.

“#thevoice !!!!!!!!! Such a fan,” the 35-year-old actor posted on Instagram with a pic of himself with The Voice judge Cee Lo Green. Check out the pic below!

PHOTOS: Check out the latest pics of James Franco

The day before, James was all smiles while attending a book signing for his new book “Actors Anonymous” in the Big Apple.

Check out a video below of James promoting his new book on the Today Show.