Acting, say, is the art of performing a role in a play, film, or other production. Onstage, or 7 letters, is a term used to describe an actor's performance in a live theater setting. On the stage, or 10 letters, is a phrase used to describe an actor's performance in any type of production, whether it be live or filmed. Acting is a form of expression that allows performers to bring stories to life and evoke emotion from their audience.