It's funny: I'm a lifelong musician, but because I principally play the piano it's been a solitary thing.

As an actor, you people-watch, you observe. And the more famous you become, the sad thing is you lose the ability to do that. Instead of people-watching, you become the focus of attention.

I drank for about 25 years getting over the loss of my father, and I took the anger out on myself. I did a good job at beating myself up sometimes.

I grew up in Deptford in south London, and at that time I used to wear toppers, loon pants and tonic suits from shops like Take 6 and Topman. I was a bit of a soul boy, but I had a very eclectic taste in music - I was into James Brown and Bowie; and I was the only kid in the neighbourhood who would also be listening to Chopin.

It's always hard when you're playing someone for a lot of people out there who are going to see the movie after reading the books. There's a communion between a reader and the writer, so people will have an idea who Sirius Black is and I might not be everyone's idea of that.

I didn't do drugs. It wasn't my thing. But the drink was terrible. Today when I look back, it's like I was another person. You could call it a coping mechanism, but that would be an excuse. I just drank too much.

To be honest, Im a little tired of playing bad guys. I long to do a comedy. But it was fun knocking Indiana Jones around.