"If you're cast right you can actually just let yourself go because all your gestures will be right, all your intonations will be right because you just somewhere understand who this person is"

This quote by Susan Sullivan speaks to the value of being cast properly in a function. When a star is cast correctly, they can let go and rely on that their efficiency will be precise and real to the character. This is because they have a deep understanding of who the character is and how they should be represented. Sullivan is stressing the significance of being cast properly in order to offer an authentic performance. It is only when an actor is cast correctly that they can trust their impulses and let go of any inhibitions. This permits them to fully embody the character and bring them to life in a manner that is real to the character. Sullivan's quote speaks to the value of being cast properly in order to offer a genuine efficiency.