I have a lot more writing experience than Paul Dano has, so to be able to put that experience to use in exercising his vision was almost an acting exercise: How would I write if I were Paul? When I look at it, it feels so completely his, but it's also mine.

I think most actors jump at the chance to do something where the camera's on them all the time.

In New York you can just walk out and be among people. You're on the subway among people, you go to cafes, you can talk to people.

I've always really been interested in the Pygmalion myth and both what it has to say about creativity and what it has to say about relationships between men and women. I'd been thinking about what I would want to do with that if I was going to write on that theme, and one morning I woke up and Calvin and Ruby Sparks were in my head.

I'm definitely feeling whatever's going on pretty hard. It's like playing Barbies. You're holding the Barbies, but all of the action is happening inside of your head. You might be holding them or even speaking out loud, but really, all of the animation is internal. That's sort of how I feel about my writing. And then the really awful thing is that at the end of the day after crying and experiencing things, then you look at what you've written and you're like, "Hmm, there's half a page that's good here." Then you throw out everything else.

If I'm not working, I don't feel complete.

A lot of what I've had produced are plays, and I just don't want to do that. It's different than a movie, where you only have to act the scenes the one time, and you have other collaborators helping you make it better, so you don't feel as obsessed with your own mind. Plays you have to do every single night, and the thought of that is agony to me. There are days when you hate your own work, and you don't want to be confronted with that, have it coming out of your mouth or listening to somebody else say it to you. There are days you want to leave the theater and get a drink.