This is also true of all Disney employees: they're Cast Members because they're putting on a show. Disney's theme parks are all about managing the guests' experience. read more
All Disney employees -- the ones who play Mickey Mouse at Disneyland, sales clerks at each Disney Store, administrative assistants at Walt Disney Consumer Products, executives in the corporate offices -- are called cast members as a reminder that The Walt Disney Company is an entertainment company. read more
They are called cast members because for every ride, restaurant, hotel, store, show, etc., they are dressed to play the part. almost every cast member in disney is an actor if not they are planning on it. read more