Movie Star

A movie star (also known as a film star and cinema star) is a celebrity who is well-known, or famous, for his or her starring, or leading, roles in motion pictures. The term may also apply to an actor or actress who is recognized as a marketable commodity and whose name is used to promote a movie in trailers and posters. The most widely known, prominent or successful actors are sometimes called “superstars” by writers and journalists. A movie star is someone who is involved in the industry of entertainment.
Music Hall antecedents
Before the advent of movies, the term "star" was already in use in the milieu of the Music Halls, at the time the most popular form of entertainment. "Star" already meant much the same as it came to mean in the context of films – i.e. entertainers who were well-known and highly popular, and who were therefore paid incomparably better than fellow performers. The term "Star" was for example used extensively during the 1907 strike in Britain which came to be known as "The Music Hall War", when Stars were praised for standing by their lesser-paid fellows and actively participating in the strike.