Justice League is a 2017 American superhero film based on the DC Comics superhero team of the same name, distributed by Warner Bros. Pictures. It is the follow-up to 2016's Batman v Superman: Dawn of Justice and the fifth installment in the DC Extended Universe (DCEU). The film is directed by Zack Snyder, written by Chris Terrio and Joss Whedon, and features an ensemble cast that includes Ben Affleck, Henry Cavill, Gal Gadot, Ezra Miller, Jason Momoa, and Ray Fisher as the title team, with Amy Adams, Jeremy Irons, Diane Lane, Connie Nielsen, and J. K. Simmons in supporting roles. In the film, Batman and Wonder Woman recruit The Flash, Aquaman, and Cyborg after Superman's death to save the world from the catastrophic threat of Steppenwolf and his army of Parademons.
The film was announced in October 2014, with Snyder on board to direct and Terrio attached to write the script. Initially titled Justice League Part One, with a second part to follow in 2019, the second film was indefinitely delayed to accommodate a standalone Batman film with Affleck. Principal photography commenced in April 2016 and ended in October 2016. After Snyder stepped down to deal with the death of his daughter, Joss Whedon was hired to oversee the remainder of post-production, including directing additional scenes written by himself; Snyder retained sole directorial credit, while Whedon received a screenwriting credit. Justice League premiered in Beijing on October 26, 2017, and was released in the United States in 2D, Real D 3D, and IMAX on November 17, 2017.
With an estimated production budget of $300 million, Justice League is one of the most expensive films ever made. The film grossed $657 million worldwide against a break-even point of $750 million, becoming a box office bomb and losing the studio approximately $60 million, while also making it the lowest overall gross of the DCEU. The film received mixed reviews from critics; although the action sequences and performances (particularly Gadot and Miller) were praised, the plot, writing, pacing, villain, and overuse of CGI were criticized. The film's tone was met with a polarized reception, with some appreciating the lighter tone compared to the previous DCEU films, and others finding it inconsistent.