As far as the filmmaking process is concerned, stars are essentially worthless - and absolutely essential.
William GoldmanWestley closed his eyes. There was pain coming and he had to be ready for it. He had to prepare his brain, he had to get his mind controlled and safe from their efforts, so that they could not break him. He would not let them break him. He would hold together against anything and all. If only they gave him sufficient time to make ready, he knew he could defeat pain. It turned out they gave him sufficient time (it was months before the Machine was ready). But they broke him anyway.
William Goldman