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.

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

I'm in a really good place. I used to be a right worrier, but being in a settled relationship has made a massive difference. I was on my own for three years before meeting David. I'm very happy with him, he's a fantastic man. But you never know what's around the corner, so you just hope for the best.

But Americans find me bizarre and always ask me why I eat so many carbs. I tell them I don't get full otherwise.

I want more children but for the next three years I want to act.

Eternity to a child offers goodness, and eternal life to a man is essentially corrupting because it involves a certain amount of vanity to embrace it.

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.