There's an incredible comfort level that I have on film sets because it's where I've grown up.

My dad grew up in Banbridge, Northern Ireland, desperate to get to London. I grew up in London, so I don't know what it's like to yearn for the big city from a small town.

A hero is also someone who, in their day to day interactions with the world, despite all the pain, uncertainty and doubt that can plague us, is resiliently and unashamedly themselves. If you can wake up every day and be emotionally open and honest regardless of what you get back from the world then you can be the hero of your own story. Each and every person who can say that despite life’s various buffetings that they are proud to be the person they are is a hero.

There is always this thing of will you get too old for your part? But people are playing a lot younger than they actually are in real life. I don't think it's as big an issue as a lot of people are making it out to be.

Normally I sit there in the films really hating watching myself. Loving watching the films, hating watching myself.

Fans are really important for me. And if they take pains to write me, it's the minimum that I answer myself.

Everyone on the set has a mobile phone, and I found by pushing a few buttons, they could be programmed into different languages. I fixed Robbie's Coltrane to speak in Turkish.