I'm a huge fan of the director, Alejandro González Iñárritu, and his work, and I knew he was going to be an amazing actor's director, based on the performances that I saw in his movies.

When you're working with the best, it helps you to be good because then you are focusing on what you have to do.

I've always said I don't believe in God, I believe in Al Pacino.

The only thing I can do is act, but it's not something I even feel comfortable doing. It costs me a lot, because I'm a shy person, even if I don't look it.

I'm a great believer in stunt doubles. They do an amazing job.

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.

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.