If I were a serious person, I'd probably have a real job.

When we were making it [Star Wars], none of the effects were in. So the first time, I thought it was, you know, that - I mean, we were surrounded by English crew members that could hardly keep themselves together. They were, "Here comes the guy in the dog suit." They made fun of us, which was OK. But the first time I was sitting in a theater, and I saw all the effects in, and the big ship flew over the audience, and the sound rumbled, I pretty much thought we were close to home.

The trick of this thing and the beauty of this thing is that it's a cowboy movie first and then stuff happens. Even after stuff happens it doesn't change - it hasn't suddenly changed into another kind of movie. It's still a cowboy movie. And that's what's incredible about it because nobody has done that before, that's new territory.

The basic skill of an actor is, in fact, empathy, and that's maybe not a skill, it's a disposition. I am an assistant storyteller. I enjoy feeling useful to a team effort. It's my way of finding a use for myself, a utility in this world.

Sometimes I try to improve the language, the lines, or the delivery, but I don't ad-lib because I think that makes it really hard for everybody else involved.

As a matter of fact, that was a bit of a problem for me at the beginning of my career - the problem of identification. In The Conversation I played a character who was gay, so nobody recognised me from American Graffiti. When I did Apocalypse Now, after Star Wars, I played an intelligence officer of the American army. George Lucas saw the footage I had done and didn't recognise me until halfway through the scene.

We all have big changes in our lives that are more or less a second chance.