Dark Phoenix (marketed outside the United States and Canada and released on home media as X-Men: Dark Phoenix) is a 2019 American superhero film based on the Marvel Comics X-Men characters. It is a sequel to 2016 s X-Men: Apocalypse, the tenth installment in the X-Men film series, fourth and final installment of the prequel films and the 12th installment overall and the first X-Men film without the involvement of Hugh Jackman as Wolverine. It is also the final installment in the X-Men film series to be produced by Bad Hat Harry Productions, though the company was uncredited due to sexual assault allegations made against Bryan Singer on January 23, 2019. It was written, co-produced, and directed by Simon Kinberg (in his feature film directorial debut) and stars an ensemble cast featuring James McAvoy, Michael Fassbender, Jennifer Lawrence, Nicholas Hoult, Sophie Turner, Tye Sheridan, Alexandra Shipp, and Jessica Chastain.

Dark Phoenix tells the origin story about how Jean Grey becomes the Phoenix. The story revolves around Jean struggling with mental illness after a cosmic force enhances her psychic powers, which unlocks trauma from her childhood that causes both her mind and her powers to become unstable. It follows Jean as she tries to avoid hurting the people she loves, while other parties seek to control or kill her.