I just kind of muddled through in my 20s. I did whatever I got offered, to be honest, to pay the bills. I didn't really know what I was doing. There are some actors in their 20s who are very sure. I wasn't very sure what I was doing. I feel like I've only really just got going.

I think actors have a choice of drawing attention to themselves or living on the outskirts.

Most of the time we do nothing, myself included, I think the lesson I learned from [playing humanitarian Tessa in The Constant Gardner] is that a lot of drops make up an ocean. If people would stand up and say what they believe in maybe we can make a difference. Helping one person is better than nothing. Just do something.

The bond between mother and baby is so interesting. Women have been giving birth since the beginning of time, but when it happens to you it feels like a miracle.

It's also that comedians don't have the kind of narcissism that actors have. They're writers who perform their own material. It's more interesting. And they're sexy because they risk more. Stand-up comedians risk more than anyone.

It's hard to remember that life is a miracle. We're just living it and we forget that.

I moved to New York last year and I love it. It's a huge change and I've always wanted to spend time there. It's like a more intense London, and everything's up a few notches. The lights are brighter, the pace is faster and the food's better.