They will have already memorized the entire opera before rehearsals even begin. When a performance is cast, the entire group begins with a run-through of the piece. They spend the next two to three weeks staging the opera. In addition to their artistic contributions, actors also have a significant impact on the economy. The entertainment industry generates billions of dollars each year, and actors are a critical component of this industry. They provide employment opportunities for other professionals in the industry, such as directors, producers, and writers, and contribute to the growth of local economies in areas where filming takes place. The work of actors is also widely recognized and celebrated, with many receiving awards and accolades for their performances.