Andy Serkis, Rise of the Planet of the Apes
To prepare for his role as Ceaser, for the movie Rise of the Planet of the Apes, Andy Serkis studied Oliver, a popular chimpanzee. Oliver was brought up by humans and had acquired very human-like expressions. Andy also followed a family of gorillas for 2 weeks in the jungles of Rwanda, so that he could learn as much as possible about their behavior.