American Graffiti was the first movie where the director let me have any input. It was the first time anyone ever listened to me. George thought my character should have a crew cut, but I wasn't happy with that idea. I'd always had pretty long hair back then - in college, particularly - so I told George my character should wear a cowboy hat. George thought about it and he remembered a bunch of guys from Modesto, California, who cruised around, like my character, and wore cowboy hats, so it turned out that it actually fit the movie.

I think it turned out to be a pretty good movie [42]. I wouldn't lie to you.

Nothing shocks me. I'm a scientist.

There is no child left within me, none whatsoever.

It's the primordial characters [of the Star Wars]. It's the beautiful princess and the callow youth and the smartass that I played and the wise old warrior that Alec Guinness played. And it was a fairy tale. It was a fairy tale.

It's always nice to anticipate working in something that you know people will have an appetite for.

I thought it was funny. I always thought Star Wars and Indiana Jones were basically comedies. The humour came out of their relationships; it came out of the fact that we were basically types.