[London is] one of the best cities in the world. There is just so much culture there and so much history and so much diversity. It's just a perfect place to grow up. I studied at the Guildhall every Saturday so I'd always be in town every weekend doing that. I was kind of a city boy really.

I got cast in a school play and I fell in love with that. I felt comfortable on stage and found out it was a brilliant way of expressing myself and I was happy and I could do it.

I love to dance and dance all night long.

I live for challenges. In my career, all I want to do is try to challenge myself and have a varied career.

I looked pretty crazy but at the time, you don't think anything of it. You think, "I've got an amazing job. I'm working and this is cool." I remember I was being fit to go to a premiere for something at Burberry and Christopher Bailey, who designs the clothes there, saw a picture of me and I looked weird. I had short black hair, hardly any eyebrows, I looked very very thin and he went, "We need to put Douglas in a campaign." So four days later, I was shooting a Burberry campaign because he had seen me looking crazy from the show so that was kind of funny.

If you don't practice for three days, everyone will notice." It's something you have to really maintain. So unfortunately, I don't play it that often but I may take it up again. If you don't play for a while, you just can't hit the notes. It's like going to the gym. If you go and do weights, you can lift x amount of weight and if you don't go for ages, you've gotta start again and start from the beginning. So it's a bit like that. It's just a muscle.

As an actor, Hollywood would be a horrible place to go if you weren't actually invited.