I tried college for three months but I was desperately unhappy. I just wanted to perform. I was getting straight As but I had no friends and cried every day.

You live with a writer [a mother], and you grow up with their words, their kind of fantasies, and I'd pretty much seen every single one of her plays, and been in a lot of rehearsal rooms, so it felt very natural and easy. It was lovely to get an opportunity to do that professionally as well.

In L.A., I'm twice the size - height and everything else - of most of the other actresses who are going for an audition.

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.

Everybody can take a good picture. Everybody is interesting. Everyone has an interesting face. Some people are more difficult or more nervous or more tired. When you do a movie, you have action, you're talking, you're moving. You don't see the camera. Taking a picture with a photographer, you don't talk, it's more difficult than in a movie for your body to relax, to be yourself.

I'm ... incredibly open with my mates. Or even people I just meet.

I think I always disappoint people, because they always expect someone very pretty. Very done. There’s so much pressure to be thin, blonde and busty. I’m skinny, but even I couldn’t fit into some of the clothes in L.A! In a funny kind of way, I think you create it yourself. I think it’s much better to go with the flow and embrace your body, whatever shape it is, and just be happy.