The Rocky Horror Picture Show is a 1975 musical comedy film that parodies science fiction and horror films. With a screenplay written by Richard O'Brien and Jim Sharman, the film features Tim Curry, Susan Sarandon and Barry Bostwick. The film is based on the British musical stage production The Rocky Horror Show.The film is considered a cult classic and a midnight movie, although it is widely known by mainstream audiences and has a large international following. RHPS was the first movie from a major film studio (20th Century-Fox) in the midnight-movie market. While the film is popular, critics point to the lack of plot, the cartoonish style, and the overly sexual nature of the film as some of its major drawbacks. Regardless, the movie is one of the most well known and financially successful midnight movies. It is the longest running theatrical release in film history. More than 30 years later it is still in limited release in theaters around the world. In December 2005, Librarian of Congress James H. Billington selected The Rocky Horror Picture Show for preservation in the National Film Registry, a collection of only 475 films (as of 2007).