The Slumdog Millionaire star was disappointed after director Rupert Wyatt decided against using real primates in the movie, but she had lots of fun looking them up on the web.

She tells Britain's Daily Mirror, ""I would have loved to (spend time with apes) but there wasn't much opportunity.

""I did spend a lot of time reading about chimps, and also examining (primatologist) Jane Goodall's interviews and all her YouTube video links, so I did that kind of research.""