Anytime you cast a movie and you need someone famous in the lead part, you’re a prisoner of whoever happens to be famous in the six month window in which you’re trying to get a film financed. I lament that many times, a director has to compromise about who these lead actors must be, simply in order to get the film financed — when that’s the single most important element of the film that should be never compromised.
— Director Alexander Payne is lucky, having cast George Clooney, Jack Nicholson, Reese Witherspoon and Paul Giamatti in his films. But he says many directors in Hollywood have to make casting compromises to finance their projects. [complete interview here]