It's so important to raise awareness of this problem that continues to affect 1 in 4 women at some point in their lifetime, regardless of career, wealth or background.

There were reports of me using fat-sucking machines and all sorts of silliness. All I did was walk a lot and breast-feed. I've never been on a strict diet. I just don't overeat, and I don't eat if I'm not hungry.

When I'm working, it's those actors (you know who you are) who sit around moaning that their trailer isn't big enough, or how bad their facilities are. I can't be doing with any of that, I just like to get on with it.

I was so completely anxious before I had a child, but now my biggest worry is something happening to her, so anything other than that I can handle. That's not to say I'm calm, because that would be b****cks! I wish it were the case, but it's getting better as I get older.

I'd like to put the record straight about that. I've been labelled an irresponsible role model for young mothers, but none of it is true. I couldn't even walk for two weeks after the birth, let alone exercise. I ate very healthily all the way through my pregnancy and afterwards. I didn't do anything extreme.

If oil exploration can threaten a place as beautiful and meaningful as Virunga, where next?

I've always chosen incredibly different roles and things that are quite offbeat. That way you're not limited.