Star Wars is an American epic space opera film series conceived by George Lucas. The first film in the series was originally released on May 25, 1977, under the title Star Wars, by 20th Century Fox, and became a worldwide pop culture phenomenon, followed by two sequels, released at three-year intervals. Sixteen years after the release of the trilogy's final film, the first in a new prequel trilogy of films was released, again at three-year intervals, with the final film released on May 19, 2005.
As of 2008, the overall box office revenue generated by the six Star Wars films has totalled approximately $4.41 billion, making it the third-highest-grossing film series, behind only the Harry Potter and James Bond films.
The Star Wars film series has spawned a media franchise including books, television series, video games, and comic books. These supplements to the film trilogies comprise the Star Wars Expanded Universe, and have resulted in significant development of the series' fictional universe. These media kept the franchise going in the interim between the film trilogies. In 2008, Star Wars: The Clone Wars was released to theaters as the first ever worldwide theatrical Star Wars film outside of the main trilogies. It was the franchise's first animated film, and was intended as an introduction to the Expanded Universe series of the same name, a 3D CGI animated series based on a previous 2D animated series of a similar name.