James Franco was out promoting his upcoming thriller 127 Hours, where he spoke to Screen Junkies about Caesar: Rise of the Apes. Here's what the actor had to say about how they are portraying the apes in the movie:

"When I first heard about it I thought, 'Well, hmm, I don't know. Those masks have cult value but... Then I found out that that's not how they're doing it, that it's actually all of Peter Jackson's Weta people doing CG and that I'll be working with Andy Serkis who played Gollum, and it was the DP from Lord of the Rings, Andrew Lesnie. I was such a big fan of those movies and I am interested in new ways of performing and new ways of filmmaking so I thought why not? I had this opportunity and try it out."
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He also talked about working with Andy Serkis, who portrays Caesar, the ape that leads the first revolt against the humans:

"When I got to do the scenes with Andy Serkis, it was actually really interesting because he plays a chimpanzee, a real chimpanzee. There's no way we would ever get the scenes that we did with a real chimpanzee. Because Andy's so good at that behavior so it's like acting opposite a real chimpanzee with great acting instincts. It was cool, it was new, new for me."