Acting is really instinctual and I think you can overanalyse what you're doing. A lot of it has to be based on instinct.

I basically have the diet of a 19th-century Irish navy, apart from the litre of stout a day. It's meat and potatoes and bread and cheese: those are my four food groups.

Richard [Griffiths] was by my side during two of the most important moments of my career. In August 2000, before official production had even begun on Potter, we filmed a shot outside the Dursleys', which was my first ever shot as Harry. I was nervous and he made me feel at ease. Seven years later, we embarked on 'Equus' together. It was my first time doing a play but, terrified as I was, his encouragement, tutelage and humor made it a joy. In fact, any room he walked into was made twice as funny and twice as clever just by his presence.

It's very rare that I get stopped or get asked for an autograph or anything - none of which I mind - but people don't really care that much.

There is something inherently valuable about being a misfit. It's not to say that every person who has artistic talent was a social outcast, but there is definitely a value for identifying yourself differently and being proud that you are different.

Go boldly and honestly through the world. Learn to love the fact that there is nobody else quite like you.

There's no blueprint for where I should be. I see myself as a young, good actor who still has a lot to learn. There's nobody at any point in their career who is the finished article.