I have a boundary problem... I need to know when to give and when to back up. I'll help someone across the street and then into their homes and they'll start telling me all their problems... and it turns out they're insane and want to kill me. I've got to know when to stop!

What are we taking from people and what do we give is a life-long struggle, I think, for most of us. Who are we? Do we like who we are? Do we know who we are? Do we care? Does anyone care? That's such a big topic. I could tackle that in many movies. So could other people.

The casting director on the movie made me aware of her. She told me what to watch Starter For Ten, which I did and thought she was great in. She was just so charming and beautiful. But I felt she could probably look plain if we tried. And when I subsequently met with her, I was so charmed by her vulnerability and sweetness. Those were two qualities that were the most important for that character.

I think I'm a good writer. I think I have my own voice, which is unique to everyone, everyone has their own voice; if they would just write from a vulnerable embarrassing place, it's going to be universal and it's going to be entertaining. Because everyone is the same and everyone is unique.

I never get tired of looking at her [Catherine Keener] and it always surprises me, despite how many hours of film I've shot on that face. She's fantastic. She does comedy and tragedy so equally well. She wears her feeling so on the surface for both. I try to stop myself from casting her but I just keep coming back to her. She's just so fantastic to work with.

Well, I tried being in front of the camera as a student and that was terrifying. But the press stuff about me growing up on his [film] sets has been exaggerated. I was an extra as a kid and I was also a PA [production assistant] on one of his movies, so I was lucky to get production experience. But I was nowhere near him.

Yeah, people seem to really relate to it and feel moved by it. It's been the most positively received of all my movies so far. I don't know why. I like it just as much as I like my others, but people think this one is the best or the most interesting. I'll take it, though. I wouldn't want them to be saying my films are getting worse.