Actors are known as thespians. Dramatic things are called thespians when they are described as adjectives. Theater is a form of thespian pursuits in which you enjoy theater. An actor or actress who performs on stage. Moving objects used on the stage as part of a theatre production. They are sometimes referred to as the cast of a play if they come together for just one performance. The troupe or repertory company will simply be referred to as a troupe if they consistently perform together.