You never in a million years thought that you would ever end up in a Woody Allen film even though that might be your dream, and there you are. Suddenly you've got one. But you're not playing the quintessential Woody Allen heroine, which is somebody that's full of self-doubt and heartbreakingly naïve. Chloe in Match Point was a nightmare in some ways and totally entitled, and felt like everything was going to be all right. Most of the women in Woody Allen films feel like everything's awful. I didn't understand what to do. But some of the confusion is helpful.

I spent a lot of time with a real detective, a lady detective inspector who was the only female detective inspector in the whole of East London. She and I hung out a lot. She showed me what she did and I spent time with her. So, [she was] a lot of the inspiration for the way I dressed and sometimes the dialogue in those interview scenes where we're cross examining and questioning the youths and trying to get a confession out of them.

I'm physically completely mal-coordinated. My best friend used to make me run for the bus just to give herself a quick, cheap laugh because I definitely don't have that sophisticated cool thing down.

I never felt I was quite the ticket academically. I always felt I had to put in an enormous amount of effort not to be disappointing. So I worked really hard, but at the time it suited me, because I didn't do very much else.

I had friends at school, but I was never part of a gang and I dreamed of that sense of belonging to a group. You know, where people would call me 'Em' and shout across the bar, 'Em, what are you drinking?' after the show.

It's censorship, really. I don't see why it's not okay for somebody under the age of 17 watch someone smoking when they can watch someone have their brains blown out? My son and I were watching an ad on the television the other day. And it said, "Rated R." He said, "What does 'rated R' mean?" I said, "God, I don't know. You can't watch it unless you're over a certain age."

I've only half-admitted I'm a professional. I know I am, I've paid my dues, but one of the things I could do better when I'm acting is to really be rigorous and to think I know how to do it. To use my brain.