I think the most difficult love begins with one's self. How you treat yourself is something you bring to your relationships.

The earliest memories I have from my childhood are of my mum getting ready to go on stage. I must have been about five and I would watch her vomiting backstage on opening night, and then the next minute she became Isabella, the Queen of Spain. At the time I remember thinking, 'What kind of schizophrenic job is this?' Now it all makes sense.

I'm getting so old - it's more uncomfortable to do those scenes now than when I was 20. I mean, I don't have a big problem with nudity on screen. But usually the days when you do those naked love scenes are the weirdest ones on set. Everyone is uncomfortable. You're like, 'Hi. How are you?' Then the next minute you're with an actress who you don't know and you're pretending to make love to her in front of all the crew. The acting challenge is pretending things are OK.

I want to act because I don't know how to do anything else.

A part of being an actor is I people watch. I like to observe their behaviour, watch their reactions on the street and see how they talk to each other, and that's impossible when they are looking back at you. I used to enjoy taking the train and watching people in their own minds, struggling with themselves.

We live in the moment now where this whole movie business is crazy.

But I remember the moment when my father died. I wasn't a very committed Catholic beforehand, but when that happened it suddenly all felt so obvious: I now believe religion is our attempt to find an explanation, for us to feel more protected.