In my first few years as an actor, I took one terrible TV job after another. But even as I laughed off my awful roles and made fun of myself to friends, my work made me cringe - I dreaded anyone's seeing it. I was crushed that I wasn't doing anything I was proud of.

I'm always sort of anticipating life being difficult, but on a basic level, that's sort of on the surface, on a basic level, I'm optimistic in the sense that I think it's all going to be alright in the end.

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 guess secrets are part of the fabric of everybody's lives. I mean everybody's lives, and guilt is part of the fabric of everybody's lives.

I already feel a bit annoyed at myself for writing screenplays. It's a bit, I don't know, model-singer-dancer-actress that went to a posh school. There's something too weirdly predictable about it.

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.

It is brilliant going to the theatre and being forced to sit and listen and think about life. It can be almost a near-religious experience.