Casting is really a black art. It's a huge part of directing...

Casting is really a black art. It's a huge part of directing and it's the most invisible. It's one that people don't really think about or talk about. But you can really destroy your movie by casting it badly before you've shot a foot of film. And yet there are no guidebooks for it, there's no rule book to tell you how to do it. It's all your own experience and your own sensibility and your own intuition.