The Flash is a 2023 American superhero film based on the DC Comics character Barry Allen / The Flash. Directed by Andy Muschietti from a screenplay by Christina Hodson and a story by the writing team of John Francis Daley and Jonathan Goldstein alongside Joby Harold, it is the 13th film in the DC Extended Universe (DCEU) produced by DC Films. Ezra Miller stars as Barry Allen, who travels back in time to prevent his mother's death and becomes stranded in an alternate past. Sasha Calle also stars in her film debut, alongside Michael Shannon, Ron Livingston, Maribel Verdú, Kiersey Clemons, Antje Traue, and Michael Keaton.

Development on a film featuring the Flash began in the late 1980s and various iterations were planned through 2014, when it was redeveloped for the DCEU and Miller was cast. Multiple writers and directors were attached over the following years, with Seth Grahame-Smith, Rick Famuyiwa, Daley, and Goldstein all departing the project over creative differences with the studios. Muschietti and Hodson became involved by July 2019, and pre-production began in January 2020. Influenced by the 2011 comic book storyline Flashpoint, the film explores the multiverse and features other DC characters, such as Calle's Supergirl and multiple versions of Batman, including Keaton's portrayal from the films Batman (1989) and Batman Returns (1992), while others were digitally included. Filming lasted from April to October 2021 at Warner Bros. Studios Leavesden and on location throughout the United Kingdom. The film's ending was altered several times during post-production due to wider DC plans changing under different studio leaderships.

The Flash premiered at Grauman's Chinese Theatre in Hollywood, Los Angeles, on June 12, 2023, and was released by Warner Bros. Pictures in the United States on June 16, following multiple delays caused by the director changes and the COVID-19 pandemic. The film received mixed reviews from critics, who praised its humor, action sequences, and performances, but criticized the visual effects and third act. It was also a box-office bomb, grossing $271.4 million worldwide against a budget of $200–220 million. Its box office performance was attributed to factors such as Miller's legal issues and controversies, the franchise's imminent reboot with the DC Universe (DCU), an overall decline of the superhero genre, and the film's mixed reception and marketing practices.