When I was younger, I was very athletic and I always loved sports and physical things.

When I was younger, I was very athletic and I always loved sports and physical things.

I was 12 and I remember every­thing. I mean, I had done two films before that. The first was actually with Amy Heckerling. It was so brilliant to work with her on my first film. Atonement was the third one I'd done, and I remember how it felt to arrive on set every day. I remember how it felt to get my wig off at the end of the day. I remember how hot it was.

I've always wanted to act and I grew up a little on film sets when my dad was working as an actor.

I certainly don't feel like I am desperate to run away from a film set. I love the hustle and bustle. Everything is sort of mad right before a take, and then it just settles, and you've got these two minutes of a bit of magic. I just love that in film.

One of the things that would steer me away from a franchise is that I'm playing the same character all the time and I wouldn't want to be known for that.

That's what acting is. You're pretending to be someone else.