Dark Phoenix is a 2019 American superhero film based on the Marvel Comics X-Men characters, produced by 20th Century Fox and distributed by Walt Disney Studios Motion Pictures. It is the twelfth installment in the X-Men film series, a direct sequel to X-Men: Apocalypse (2016), and the seventh and final installment in the main X-Men series. The film is written and directed by Simon Kinberg and stars an ensemble cast featuring James McAvoy, Michael Fassbender, Jennifer Lawrence, Nicholas Hoult, Sophie Turner, Tye Sheridan, Alexandra Shipp, and Jessica Chastain. In Dark Phoenix, the X-Men must face the full power of the Phoenix after a mission in space goes wrong.
After X-Men: Days of Future Past (2014) erased the events of X-Men: The Last Stand (2006) from the series' timeline, Kinberg expressed interest in a new adaptation of Chris Claremont and John Byrne's "The Dark Phoenix Saga" in a future film that would be more faithful than his previous attempt with The Last Stand, which was not well received. The new adaptation was confirmed as a follow-up to Apocalypse in 2016. Kinberg signed on to make his directorial debut in June 2017, when the majority of the cast was set to return from Apocalypse. Filming began later that month in Montreal and was completed in October 2017; the entire third act was later reshot in late 2018 following original third act not being received well in test screenings. The film was dedicated to the memory of X-Men co-creator Stan Lee, who died on November 12, 2018.
Dark Phoenix was theatrically released in the United States on June 7, 2019. The film received mostly mediocre to negative reviews with many critics who describing it as "boring" for its lack of plot and character development, although the performances (particularly McAvoy and Turner) and Hans Zimmer's score were praised. Many viewed the film as a disappointing and anticlimactic conclusion to the Fox X-Men series, and it is the worst-reviewed installment of the franchise according to Rotten Tomatoes.