I’d been auditioning for parts for years, I never got any better at it. I’m crap at auditions.

I’m not saying we had a playroom, but I’m not shocked by the sex in the book. It’s essential to tell the story. I can’t believe films that don’t invoke a sexual side of it. So it works for me.

Jamie Foley - he's a very different energy to [director] Sam [Taylor-Johnson]. The whole experience was actually quite different.

I'd known plenty of people who'd worked with Cillian [Murphy], and he was one of those people I'd only heard good things about. It's pleasing when it works like this. As Cillian said, it's not always like that.

It's a tiny industry. Actors all know each other to a point where you always know someone who knows the other person who worked with them.

It's not like I cleaned up with girls. I always looked young and I was very small; I hated being 'cute.'

Because I used to play a lot of sport, I've always been in decent enough shape. When I used to get asked to do a bit of body work before a photo shoot I'd lie and say, 'Yeah, I'm going to the gym.' I literally never did anything.