The "cast" of a movie, TV show, or a play are the actors.

The difference between "actors" and "cast" is that there are many actors in a movie, but only one cast. "Cast" refers to the entire group together.

People often use "cast" along with the word "crew", which means the people like who work on the film or play who are not actors. Sound crew, lighting crew, stage hands, and assistant directors are part of the "crew".