Jurassic World is an American science fiction adventure film. It is the fourth installment in the Jurassic Park film series. The film was in "development hell" for over a decade since the release of Jurassic Park III in 2001. The film was initially scheduled to be released on June 13, 2014, but production was temporarily halted due to a disagreement between writers and Universal Studios regarding the film's script and direction. The film is scheduled to be released on June 12, 2015. Colin Trevorrow is directing a screenplay he co-wrote with Derek Connolly, with Patrick Crowley and Frank Marshall producing. Steven Spielberg, director of the first two films in the series, will act as executive producer as he did for the third film.