I think because I did become a well-known face in my thirties and not in my twenties, I was pretty settled in my boots and I knew who I was. And I think there's a sort of Scottish thing, too, where you don't take yourself too seriously, and you don't get carried away with your own sense of self-importance.

As a child, I always chose a false nose and some face paint and a wig for my birthday.

My mum Margaret was a single parent, but though life was a bit of a struggle she gave me every encouragement.

I know what I look like. I'm not a babe who's automatically going to be the leading-lady type. I think I would always be cast as the friend. I probably tend to look crap more often than I look good. I like messing around and pulling funny faces and doing funny walks.

I wanted to live where I could pop to the bar that Humphrey Bogart took Lauren Bacall to, or the little restaurant where Charlie Chaplin had a booth.

Well, I'd never done an animated movie before, which is why I was so excited about doing it. It was one of the little boxes as an actor that I wanted to tick off. I wanted to do an animated film. So, after my mum got over the fact that I was never going to play Shrek's sister, this was the nearest I was going to get!

I only do children's films now! I think when you go to LA some people feel you've defected a little bit and that's not really the case. Ideally, I would love to work here and to work in America. That's in an ideal world. In fact, I came back to Britain recently to do an ITV1 drama that will be out in April for a couple of months! But I'm flying back to LA to do a pilot season. So, to work in both places is great.