[Warren Beatty] is voraciously detail-oriented.

I grew up watching a lot of old movies, so getting to ask about making movies in the '70s and people he was friends with, like Orson Welles, Lillian Hellman and Charlie Chaplin, and hearing a first-person account was pretty incredible.

[Warren's Beatty] first film being with this very important director [Elia Kazan], I think we related on that in a big way. And I just was genuinely curious about his experiences in film, and about the people he knew.

Elia Kazan - the films he made were such a big deal for me when I was growing up.

Some movies, I think, present ideas of the world that just don't help people with their lives. They just present things that are fleeting or stupid. So that's what I'm careful about - making sure I'm part of something that is saying something that I think is valuable in the world of people, not necessarily in the world of art.

That's something that Francis [Ford Coppola] would always say. I remember when I was doing Tetro, he said, "Stay innocent. I'm 69 years old, and I'm still innocent."

It feels like you're being invited into a kind of community [working with the Coen brothers].