I just got back from New York, and I realized in New York, it's very difficult to hear a New York accent. It's almost impossible, actually - everybody seems to speak like they're from the Valley or something. When I grew up, you could tell what street in Dublin someone's from by the way they talked.

It's the opposite journey from what I've usually done with films. I find it very easy to go from, say, a lit, pleasurable environment, like what you see outside there, to a very dark place. But the opposite journey, which is what this movie takes, is much more complicated.

Never make a promise - you may have to keep it.

I had made a decision, although I hardly knew it yet. It's often that way with decisions, they're made in some hidden part of us and the awareness secretes itself slowly into that conscious part of us that imagines it decides.

It's hard to know whether certain characters come to life or not, they either come to have their own life or they don't. I've written many things in which the characters just remain inert.

I don't think we have enough imaginary creatures in cinema. It seems like we're stuck with zombies, vampires, and werewolves. We should have everything. We should have minotaurs. We should have elves. We should have mermen in popular culture. But instead we've stuck with vampires.

Initially with The Butcher Boy, there was this kid growing up in this strange, weird environment that I remember from when I was a kid. And Patrick's vision was so complete there.