I think we can be very narrow-minded in this country; you see something that someone's done and immediately want them to do the same thing again - but if they don't, they're criticised for not doing the same thing again, but if they do they're just repeating themselves.

Rather than something like King Kong where I really went after studying gorillas in the wild and captivity. I based Caesar [ from the Rise of the Planet of the Apes] on a real chimpanzee and I worked with Terry [Notary] on a lot of chimpanzee movement.

Gorillas are still wild creatures. That's made very clear when you observe them in nature. They charge and perform other displays that are terrifying by design. But they don't attack unless they feel threatened.

The wonderful thing about 48 fps is the integration of live action and CG elements; that is something I learned from 'The Hobbit.' We are so used to 24 fps and the romance of celluloid but at 48 fps, you cannot deny the existence of these CG creations in the same time frame and space and environment as the live action.

Not a day goes by where I'm not reminded of Gollum by some person in the street who asks me to do his voice or wants to talk to me about him. But because 'The Hobbit' has been talked about as a project for many years, I knew that at some point I'd have to reengage with him.

The learning curve is 'The Hobbit' is being shot in 3D.

My agent told me they were casting for the voice of Gollum. I hadnt read The Lord of the Rings, but I read the script and realized what an amazing role it was. I developed a voice for the audition tape, then met Peter Jackson and Fran Walsh at the auditions and fell in love with them both.