I love it when a character requires me to look less than my red-carpet best.

My dad was an actor, and my older sister is an actress, and so I very much remember thinking, "Well, of course I'll do that as well." But I never imagined myself as an actor who would be in films. I always only thought of myself being in a play or a musical and maybe the odd episode of [U.K. '80s TV drama] Casualty. My backup plan was to do something with children, to start a nursery school or work with underprivileged kids. And I still dream of maybe doing that in some way. I've always got children in my house, always.

I love the routine. I love getting up in the morning and getting breakfast and packing lunches and doing the school run. Those things are really important to me. Because I think that those small but key moments are crucial for a kid.

At some stage I'm going to have to say, 'Right, that's it. I'm stopping for a bit'.

Apart from The Holiday, I haven't really spent a huge amount of time in LA. Not that I avoid it, it's just that I don't often go there unless I'm doing press. The one thing I have discovered about LA with kids is that it's really great for children. They really like the sun and making sand castles.

Loving someone is setting them free, letting them go.

My skin still crawls if you call me a movie star. I get embarrassed. I think, don't be ridiculous. Maybe it's because I'm British. To me, Julia Roberts, that's a movie star. But when people do call me one, that, I think, is an enormous compliment but, my God, is that a responsibility!