Acting companies are groups of actors who come together to perform plays and other theatrical productions. These companies often collaborate on various projects, sharing resources and talent to create engaging performances. Historically, acting companies were essential in the development of theater, especially during the Elizabethan era when they performed in public theaters. Many acting companies operate as professional organizations, while others may be community-based or educational. They can vary in size and scope, ranging from small local troupes to large, well-known ensembles. Some famous acting companies include the Royal Shakespeare Company and the Actors Studio, which have made significant contributions to the world of theater.