My goal was for acting to become my main income. I would say to myself, 'I'm good enough'. That became my mantra.

[As an actor] I have ideas, but things should always be fluid. You should always be ready to follow an instinct. Something might reveal itself on the day.

We're all curious about a lot of things.

We moved to Ireland when I was two and we settled in Killarney, Co Kerry. Where we were living in Germany is very industrial and very grey and my parents wanted to have countryside around for my sister and I to grow up in.

For me, addiction comes down to basically where a pattern of behaviour has developed and that pattern of behaviour is becoming a very damaging cycle. It's sort of damaging your relationships, friends or lovers, it's damaging your own personal health and it's damaging for you and your workplace.

If I'm playing a murderer, I don't go out and start murdering people.

If you're dealing with a character that actually exists, there's an awful lot of information there. So, you can put together, from the information, motivations, insecurities, reactions. Where does that seed get born, if you like?... What I do is put that together.