A group of people that performs a movie in front of a screen while that movie is playing; they essentially pantomime the movie. Most often seen during showings of The Rocky Horror Picture Show.

A group of actors who get onstage to do a performance of a movie while the movie itself plays on the background, therefore casting shadows on the screen. Also, the performance of same. First started by The Rocky Horror Picture Show, other movies that are often shadowcast are REPO! The Genetic Opera, Hedwig and the Angry Inch, Phantom of the Paradise, and Dr. Horrible's Singalong Blog.

A group of people who love a movie so much that they feel like performing a live show in front of the movie for (usually) midnight audiences.

A shadow cast is when there is screening of a movie and people will shadow the movie in costume. Most known for the Rocky Horror Picture Show having thousands of shadow casts in America. All of the time they will be held at night or in the morning so the theater won't loose any money showing it. Also the group performing needs to rent the movie from the company that realsed the film. Most of the time the shadow cast is of cult films.