In 'Tintin,' it's like a live-action role. You're living and breathing and making decisions for that character from page 1 to page 120, the whole emotional arc. In an animated movie, it's a committee decision. There are 50 people creating that character. You're responsible for a small part.

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.

Originally when I went off to work on 'The Lord of The Rings' I got a call from my agent saying that I was just going to do a voice. But I couldn't really approach it like that. To get Gollum's voice I had to play the character.

I've been writing and wanting to direct for a long time.

When you start to do research into gorillas or any kind of apes, if you're going to play them, that's one of the biggest misconceptions. And when I did Kong, you're not doing gorilla movements, you're not doing ape movements, you're looking for a personality. It's like saying okay I'm going to do human movements.

It's a really unique situation where you just - you make independent films or you make big blockbuster movies, but it's very rare when all of those ingredients come together, and you can really tell a story that you care about with a character you absolutely love with the people you love making movies with.

Acting is a sort of pressure cooker that allows the fizz to come out the top. God knows what I'd be like if I didn't have that.