I've reached a point in my life where going to the supermarket is a day out.

There was actually a camera on your face. I don't know so much about the animation process but the camera was in our face so it could get expressions from our faces that would eventually arrive on the gnomes. It almost felt like you were cheating at times because it was a wee bit too much fun. You were in that box on your own. Kelly [Asbury] was in Toronto, I was in LA, so I was just on my own. I thought: "I can't be getting paid for this as well!"

I always felt slightly grubbier than most American people. I was never quite as groomed as everyone else, never quite as fit as anyone else. I didn't have my protein shake and my vitamins.

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 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.

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.

I always knew I wanted to be an actor, certainly from the age of eight or nine. I think when you know what you want to do, you're very lucky because you've got a focus.