Christian Bale is praying The Dark Knight director Christopher Nolan signs up for a third Batman film - because nobody will be able to better the moviemaker's previous efforts.

Bale was directed by Nolan in 2005's Batman Begins and reprise his role as the caped crusader for last year's box office smash, which grossed more than $1 billion worldwide.

The actor is contractually obliged to star in a third film - but he's worried about the future of the franchise if Nolan refuses to take charge.

He tells Total Film magazine, "It's got to be the right story. You can't make something like The Dark Knight and then come out with something disappointing.

"The fact is, I have to (make a third movie). I've signed up! Chris doesn't. So I'm in a bit of a fix if he says he doesn't want to!"

Christian Bale Photos

(This news article provided by World Entertainment News Network)