I love working with horses. People say you shouldn't work with animals and children; that's wrong. You must only work with children, because you only work eight hours a day and I love working with animals. Animals have an honesty that human beings reach to find in their lives at the best of times.

Yorgos Lanthimos said, "What about if he's a bit soft?" And I said, "Yeah, I think you're right." He just comfort-eats a little bit too much. He's just asleep in his own life and has let himself go. And the mustache, I don't know if it was him or I suggested it. But I remember my sister was watching me eat and she was like, "God, does he have to be fat?" And in retrospect I couldn't think of David being any other way because it affected the way I moved. It really did. It slowed me down in a way that I felt was conducive to kind of tapping into the spirit of the character.

I've started films like Miami Vice where I'm in really good shape and I look back on that film and see the moustache is bigger as I've got a larger face.

Vampires have always held a very seductive kind of lore and have always been some variety of attractive, whether it's attractiveness that's born of just the physical attributes that they have - this kind of ethereal beauty or translucent pallor - or whether it is more to do with the way they carry themselves.

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.

Magic is at the core of myths.

Yeah loads of bruises and welts, usually around the hip, arse, thigh region and elbows. Elbows got knocked up big time, but it was so much fun. I hadn't done a meaty action film in seven or eight years, so it was fun to explore that aspect of storytelling again.