An actor has to be very, very careful, as one of the most wonderful props - and actors love props - is a cigarette. There's so much to do with it: you can bring it up to your face, play with the smoke. It's just the greatest - ever since I was 16 and in acting school in England, I've been playing around with cigarettes.

I do, however, have tape over my eyepiece as well. What I think my peace is saying isn't, "Oh I have something to hide. I don't want you to look," it's more saying, "No thank you. I prefer you not look. I'm not giving you permission."

The key to acting has much more to do with listening than with talking.

I was really not familiar at all with Edward Snowden. I like to get that right out of the way and really learned most of what I know from Oliver's [Stones] script.

It's not exactly an interview that's going on [in documentary]. I guess we do ask Edward Snowden some questions and we're recording him answering them and so on like that.

One time, many, many years ago, I had the opportunity to dye my hair brunette for a film. And the day I walked out of the hotel where I had it done, I walked out onto the street and realized people looked me in the eye and greeted me good morning. I'd never had that experience before! And I began to notice that a brunette is treated as an affable human being. Later, when I dyed my hair for Lois Riley blonde, and then Alice Ward blonde, people come right up to you, they touch you on the arm, they ask you how you're doing. Men and women both! Blondes have more fun.

Acting is the business of truth, so that we can see ourselves reflected back and learn.