They should be looking for actors, not stars. With Aaron Sorkin's name on it, you got enough star-power to give this film a high profile. Chasing celebrities to try and increase audience is foolish. People who would see this fim because the latest pop phenom is in it will be very disappointed. They should market it as an independent film and cast great working actors who may be unknown now, but will have a chance to become better known as a result of this quality writing.