Onstage, there's no hiding; you either can or can't act. There's no second take.

I've been on sets where the turnaround is so fast and the budget so small that the actors have been asked to speed things up and save money by changing in the public toilets. There's no room for vanity at times like that. It's the best way: get on with it!

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.

Being a mother gives you an incredible feeling of empowerment, you think if I can go through such pain and that level of sleep and still operate and not be grumpy you can do anything. It can be quite scary, you can't function your brain, forget your vocabulary.

Well ironically my last three roles have all been a mother. One was a Canadian film where the baby was taken away because she is a drug addict, in Irish Jam I play a mother to a four year old. I think in the future I'll be able to handle the role with a lot more depth.

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

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.