[custom_adv] An actress is a person who portrays a character in a performance. The actor performs "in the flesh" in the traditional medium of the theatre or in modern media such as film, radio, and television. [custom_adv] The analogous, literally "one who answers". The actor's interpretation of their role—the art of acting—pertains to the role played, whether based on a real person or fictional character. [custom_adv] Interpretation occurs even when the actor is "playing themselves", as in some forms of experimental performance art. [custom_adv] In the 19th century, the negative reputation of actors was largely reversed, and acting became an honored, popular profession and art. The rise of the actor as celebrity provided the transition, as audiences flocked to their favorite "stars" [custom_adv] By the early 20th century, the economics of large-scale productions displaced the actor-manager model. It was too hard to find people who combined a genius at acting as well as management, so specialization divided the roles as stage managers and later theatre directors emerged. [custom_adv] By catering to tourists, theaters in large cities increasingly favored long runs of highly popular plays, especially musicals. Big name stars became even more essential.