Only a few actors achieve recognition as stars on the stage, in motion pictures, or on television. A somewhat larger number are well-known, experienced performers, who frequently are cast in supporting roles. Most actors struggle for a toehold in the profession and pick up parts wherever they can. Some actors employed by theater companies teach acting in courses offered to the public. In addition to the actors with speaking parts, extras, who have small parts with no lines to deliver, are used in almost all motion pictures, in many television shows, and in some theater productions.
Directors interpret plays or scripts.
In addition, they audition and select cast members, conduct rehearsals, and direct the work of the cast and crew. Directors use their knowledge of acting, voice, and movement to achieve the best possible performance and usually approve the scenery, costumes, choreography, and music. Producers are entrepreneurs. They select plays or scripts, arrange financing, and decide on the size of the production and its budget. They hire directors, principal members of the cast, and key production staff members, and they negotiate contracts with artistic personnel, often in accordance with collective bargaining agreements.