World War Z is a 2013 American action horror film directed by Marc Forster, with a screenplay by Matthew Michael Carnahan, Drew Goddard, and Damon Lindelof, from a story by Carnahan and J. Michael Straczynski, inspired by the 2006 novel of the same name by Max Brooks. It stars Brad Pitt as Gerry Lane, a former United Nations investigator who travels the world seeking a solution for a sudden zombie apocalypse, along with ensemble supporting cast including Mireille Enos and James Badge Dale.

Zombie apocalypse is a subgenre of apocalyptic and post-apocalyptic fiction in which society collapses due to overwhelming swarms of zombies. Typically only a few individuals or small bands of survivors are left living. In some versions, the reason the dead rise and attack humans is unknown, in others, a parasite or infection is the cause, framing events much like a plague. Some stories have every corpse rise, regardless of the cause of death, whereas others require exposure to the infection.