I've learned, having been on a lot of sets, the good news is that by definition you are surrounded by experts. They get fired if they're not - unlike in the theatre!
Alan RickmanWhy don't I like you?" "Because you think I'm an asshole, and I'm not really, I'm just British and, well, you're not.
Alan RickmanIt's a nightmare to sit and watch a film that I'm in. There's a horrible inescapability to it.
Alan Rickman