Mark Waters

Particularly in these high school-set movies, there's something about being in high school that's like a cauldron, a boiling pot of emotion and joy and heartbreak that you feel so intensely. Because you don't have any awareness yet, you don't realize that it's a finite time and feeling.

If you're in pop music, you've got to deal with the changing of the guard every few years. By the time the '70s arrived, I was well aware of the cyclical nature of the game. Pop music is a creature of the moment; it thrives on the mood of its time. Either you hook into that or you're not going to be part of it.

I like to be busy. I once shared an agent with the late Sir John Gielgud, who, at 96, was apparently still ringing up, saying, 'Hello, Gielgud here, any work?' Good on him. We've got to keep working. If we retire, there'll be nobody to play the old wrinklies, and that would be a dreadful shame.