The Killer is a 2023 American action thriller film directed by David Fincher from a screenplay by Andrew Kevin Walker. It is based on the French graphic novel series The Killer written by Alexis “Matz” Nolent and illustrated by Luc Jacamon. The film stars Michael Fassbender in the title role, alongside Arliss Howard, Charles Parnell, Kerry O’Malley, Sala Baker, Sophie Charlotte, and Tilda Swinton in supporting roles. It follows the titular assassin as he embarks on an international vendetta after a hit goes wrong.
Development on the graphic novel adaptation began in 2007 at Paramount Pictures and Plan B Entertainment, with Fincher signed on as director and Alessandro Camon as screenwriter. In 2021, Fincher later moved the project over to Netflix with Andrew Kevin Walker replacing Camon as writer.
The Killer premiered at the 80th Venice International Film Festival on September 3, 2023. It received a limited theatrical release on October 27, 2023; it began streaming on Netflix on November 10, 2023. The film received positive reviews from critics.