If Bono left, we could carry on. If I left, we'd be screwed.

We all have views on what our Irishness means to us. Two members of the band were born in England and were raised in the Protestant faith. Bono's mother was Protestant and his father was Catholic. I was brought up Catholic. U2 are a living example of the kind of unity of faith and tradition that is possible in Northern Ireland.

I think I look cool. I don't know about the other three but I look cool, I am cool.

The big issue with rock stars becoming actors is that sometimes it's not believable, and vice versa with actors becoming rock stars. Sometimes just doesn't fit.

If Bono left, we could carry on. If I left, we'd be screwed.

The only thing I wouldn't like to do is to play roles as a musician. I'm not sure that I would be comfortable doing that, and I'm not sure I'd be very good at it. I think I would be better served, and would be a better partner, if I was in something outside of myself.

Relevance is a big, big question. It's more about what's your definition of being relevant. In the music world, agism is a big issue. It's about youth and youth culture. There's no other art form that I know that requires you to be a certain age.