I haven't left the house without a packet of Kleenex in my back pocket for as long as I can remember. Whenever I start thinking I'm incredibly cool, the packet of Kleenex in my back pocket brings me right back down to earth.

And of course I've got kids of my own now, and they love me being in the Harry Potter films. I'm now part of a phenomenon. You become incredibly cool to your kids, and you get a young fan base. So you became the cool dad at school. You're suddenly hip.

There aren't many poster children for cool angst. Everybody thinks it's cool if you're the bad girl.

For the last few years, it's been so chic for everybody to be miserable. Like if you're in with the cool crowd, you can't be happy.

Now I'm way into suits that I can put on whether I took a shower or not, and wear barefoot and paint my toes black or whatever color the suit is. It's very cool to wear suits like that. Roll up the sleeves and just say yee-haw.