Sometimes I have experienced at the start of a film you're very excited and enthusiastic and you've done all your preparation internally and externally and you start the film and it's all go... Then your attention goes somewhere else. Your energy goes into telling the story, so you don't have the same amount of energy to be objective, and that's okay because sometimes you become a subject of the story and you're inside it so much that you don't need to keep on looking on the outside.

Women tend to immediately take responsibility if somebody messes up with both of us saying it's our fault. Men are quite happy for it to be your fault it seems like.

I never think I'm capable of any of [action movies]! I'm always terrified, but luckily on this one it was directed by my husband [Len Wiseman]. 'I can't possibly do it. I'm too scared, I can't do it.' He says: 'Go on. DO it!' So it is shocking as I'm not one of those people who finds that stuff easy.

You consciously look after yourself, whatever that may be to you, whether it's going out for a few drinks and a bit of dinner, or just hitting the couch and watching TV, or going to the gym or yoga class. Just being aware that there's a potential for you to be in it and respecting wherever you find yourself is good enough.

I did loads of auditions and I didn't get called back. I still get giddy at all the people I get to work with, and I'm still enjoying the work and enjoying life too much that I don't feel like I've done that much.

It's not that I'm stupid. I just don't think sometimes.

I hadn't really met Colin [Farell]. It's really weird to say: 'Oh, hello, I'm Kate...I'm Colin.. shall we?' That's a bit strange. Len was fine with it. We've gone through this experience with Scott Speedman before on the first Underworld move. It was our little version of swinging. We survived that.