With the addition of an actor to the chorus, new types of theater developed: tragedies, comedies, and satyr plays, each requiring choruses of different sizes. The playwright Aeschylus (524-455 BCE) standardized using a second actor, until finally the accepted convention in Greek theatre was three actors. Though masks and costumes allowed the three actors to take on multiple roles, comedies and tragedies often featured other characters (nurses, advisors, guards, attendants—the kopha prosopa, or "silent faces") who did not speak.
Originally, following the tradition set by Thespis, the playwright would perform as the lead actor in his plays. The playwright Sophocles (496-406 BCE), was the first to step aside and employ professional actors. In the theater, focus gradually shifted from the choregos, poet, and chorus to the actors. By the 440s BCE, actors would be recognized with festival awards, form the "Artists of Dionysus" guild—and become "stars."








