Watchmen is a 2009 American superhero film based on the 1986–1987 DC Comics limited series of the same name co-created and illustrated by Dave Gibbons. Directed by Zack Snyder from a screenplay by David Hayter and Alex Tse, the film features Malin Åkerman, Billy Crudup, Matthew Goode, Carla Gugino, Jackie Earle Haley, Jeffrey Dean Morgan, and Patrick Wilson. A dark and dystopian deconstruction of the superhero genre, the film is set in an alternate history in the year 1985 at the height of the Cold War, as a group of mostly retired American superheroes investigate the murder of one of their own before uncovering an elaborate and deadly conspiracy, while their moral limitations are challenged by the complex nature of the circumstances.

Watchmen is a comic book limited series by the British creative team of writer Alan Moore, artist Dave Gibbons and colorist John Higgins. It was published monthly by DC Comics in 1986 and 1987 before being collected in a single-volume edition in 1987. Watchmen originated from a story proposal Moore submitted to DC featuring superhero characters that the company had acquired from Charlton Comics. As Moore's proposed story would have left many of the characters unusable for future stories, managing editor Dick Giordano convinced Moore to create original characters instead.