Caesar [from the Rise of the Planet of the Apes] was brought up with human beings and because of the drug he had pretty much grown up with his whole life, he felt like an outsider, he felt trapped in an ape's body but he didn't really feel like an ape and that was my way into the character. So he's always had this duality playing him from an infant all the way to now as a fifty-five year old ape.