While actors go on late night shows all the time to promote whatever project they have coming out, I don't think I've ever seen a big star promote something they weren't in.  But that's what Ben Stiller did on Conan last night for James Cameron's Avatar.

I wonder if this was a joke he came up with, or if his very close relationship with Fox had something to do with it.  Either way, it's worth checking out.  He even brought a clip.

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