Casting Director: Their job is to know a lot about a lot of actors, so that they can advise and present to the director the best of the existing possibilities. Casting directors are highly influential and is usually on the project because the director trusts their judgements. They are also the ones who decides who the director does see. Good casting directors "discover" actor by carefully setting it up so that the director and producer will feel as if they've made the discovery of the new actor. On the occasion when the director or producer does not respond to the actor presented, they must keep in mind that they aren't directing the production, the director is the one who's going to have to work with that actor—therefore, it is casting's responsibility to delicately balance between showcasing the actor available to them and the director and producer's sensibilities, tastes, and expectations.