The Flash is a 2023 American superhero film based on the DC Comics character of the same name. Produced by Warner Bros. Pictures, DC Studios, Double Dream, and the Disco Factory, it is the 13th film in the DC Extended Universe (DCEU). Directed by Andy Muschietti from a screenplay by Christina Hodson and a story by Joby Harold and the writing team of John Francis Daley and Jonathan Goldstein, the film stars Ezra Miller as Barry Allen / The Flash, 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.

Bartholomew Henry "Barry" Allen, also known as The Flash, is a fictional character in the DC Extended Universe. Based on the DC Comics superhero of the same name, he is portrayed by American actor Ezra Miller. Originally appearing in a minor role in Batman v Superman: Dawn of Justice and Suicide Squad, Barry had a prominent role in the film Justice League, its director's cut, and in his titular film. Miller also reprised the role in cameo capacity in other DC Comics media such as the Arrowverse event series Crisis on Infinite Earths and in the HBO Max series Peacemaker. The DC Extended Universe marks the first time The Flash has been portrayed in live-action film.