I try to treat every job with the exact same level of respect. When I go into it, it doesn't matter what the budget is or who the lead actor is. You should have the same focus and the same drive, and you should have as much empathy for your character and understanding of them as you would, no matter what.

As a teenager, you're still discovering who you are, what your life is about, and who you want to be as a person. It's very intense.

Clothes are my drug. I love Camden market - I have so many vintage pieces from there it's unbelievable. Clothes are really important to me, they give me that feeling of happiness. I love being a bit free with it all and not giving myself rules.

It was really cool to work with Dakota Fanning. I've watched her grow up and I've always loved her films, loved her. It was amazing working with someone who was American as well, because obviously it's going to be a different energy straightaway. We got on really well; she's so professional and hardworking.

I've just made a cancer drama, called 'Now Is Good,' directed by Ol Parker and starring Dakota Fanning. We filmed in Brighton and it's about a girl dying of leukemia, although it's not as depressing as it sounds.

There are so many things happening nowadays that you've seen in films from years ago, like cloning and all of those things are actually happening now, so we can kind of visualize it a lot more, and I think our generation particularly know that we're going to be a big part of that, we we're kind of fascinated with how human beings will fare in the world.

I wanted to do an action-y thing, purely because I'm the least fit, healthy person in the world. I wanted to prove to myself that I could actually run and not get out of breath and collapse. I wanted to push myself, in that way.