It took me years to fully understand never to plan how I would say a line, and always to listen to the other actors.
Your responsibility as an actor is to entertain by communicating your real feelings to an audience. “Phoning it in”—performing a scene without experiencing real emotion—does not communicate. Just by having an emotion, you communicate it to your audience, the members of which in turn experience their own emotions. When you experience real emotion, you become interesting. This is called entertainment.
Casablanca, the 1942 film with Humphrey Bogart and Ingrid Bergman, is Number Two, right behind Citizen Kane, on the American Film Institute’s list of ...