World War Z has premiered its first trailer exclusively on Digital Spy.Brad Pitt leads the cast of the zombie apocalypse movie, which is based on Max Brooks's best-selling novel World War Z: An Oral History of the Zombie War.Pitt takes on the role of Gerry Lanes, a United Nations worker who is confronted with waves of the undead following a worldwide zombie pandemic.The supporting cast includes The Killing's Mireille Enos, James Badge Dale and Lost star Matthew Fox. Quantum of Solace director Marc Forster is behind the camera for Paramount's big-budget adaptation.World War Z opens in cinemas in June 2013. Digital Spy