Half of my mum's family is Welsh. I remember when I was a kid she used to read to me, and witches and wizards in books always had a Welsh accent, so I guess I took it from that really.

It's not everyday you get to do a pirate movie, you might as well go for it.

I've had my body manipulated so many different times for so many different reasons, whether it's paparazzi photographers or for film posters. The topless Interview shoot was one of the ones where I said: 'OK, I'm fine doing the topless shot so long as you don't make them any bigger or retouch.' Because it does feel important to say it really doesn't matter what shape you are. I think women's bodies are a battleground, and photography is partly to blame. Our society is so photographic now, it becomes more difficult to see all of those different varieties of shape.

It's all about perfection, isn't it?

I've always gravitated towards people who are extreme. Whether its drugs, or kicking down doors. Normally, the people in my life had to escape to get back.

I think you've got to take the risks. There's no point playing it safe, because either you'll get bored or the audiences will get bored. Sometimes, you're going to make mistakes, and that's fine, but you have to take the risks. I think Pirates is one of the prime examples of that with Johnny Depp's performance, and part of the reason that people love it so much is that you watch it and go, "Gutsy, really gutsy!"

The most important thing in playing any character is not judging.