I always find it much easier when there's one person whose vision you're following, as opposed to many people.

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.

You watch him playing Jack Sparrow, and he's loving it, and he's loving being in that world. He's still excited by it. Sometimes, he'll even say, 'Was that OK?' And I'm thinking, 'You're Johnny Depp man, you know that's OK!' But he doesn't. He's still going to [director] Gore [Verbinski] and asking for help. It's a privilege to see the human side of Johnny. It's really exciting.

I have no idea whether I am completely sane. I don't think anybody is. I see the world through my eyes. It's sometimes a strange world. I hope I don't hurt people. You hope not to hurt yourself too much, either. Maybe that's the definition of keeping yourself in check?

If I don't do this film. I'll be acting in corsets for the next 20 years.

It's an interesting thing when you discover something about yourself. To go: 'Wow, I'm not the person I thought I was. I'm in the middle of something and I can't actually deal with it.'

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