It seems that director Christopher Nolan is bringing one of his Batman buddies on board his new film. In Contention recently spoke to Michael Caine, who was promoting Is Anybody There?, and he confirmed that he has joined the cast of Nolan's new film, Inception.

I have a little part in it, yes. Just a tiny part. Chris and I are very good friends so I'll do that little part. I think I'll work about three days. It'll be extraordinary, wait until you see this one. I think if I say another word he's going to kill me!
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It was also recently reported that Joseph Gordon-Levitt has joined the cast of the film as well. The film is eyeing up a summer 2010 release.