I believe that improvisation is really just a directorial tool. It's a writing tool. It's not so much that the actors get to say whatever they want, whatever pops into their head. It's an opportunity to write the last draft of the screenplay as you're working on it.
Ivan ReitmanMy sense is, I think it's okay for directors to do movies that speak to other work in their career.
Ivan ReitmanIt's sort of the most important thing for acting, is to listen to the person you're dealing with.
Ivan Reitman