Appearing on "The Colbert Report" Tuesday to promote his new film, "Oz the Great and Powerful," Franco mentioned his plans for the project, adding: "There's a character, Slim. We haven't cast him yet … You could do it."
"Is it a big time commitment? Because I've got this show to do," Colbert responded, laughing.
Franco later told Colbert he will play George in the stage adaptation of John Steinbeck's classic novel — and again tried to coax the talk show host to join him.
"If you want to play Lenny …, " he added.
No official word on when (or if) this production will really happen, and Franco's representatives did not immediately respond to TheWrap's requests for comment.
In the meantime, here's what Franco has to say about adding theater to his actor, director, author, poet, artist and model credits: