Chilling 'World War Z' Trailer Stars Mountains of Zombies

The end is near for humans in horror flick World War Z. After a zombie outbreak threatens to wipe out the human race, United Nations worker Gerry Lane (played by Brad Pitt) leaves his family at sea to search for clues to stop the terrifying destruction

A new trailer and movie posters, however, show zombies hungry to thwart his plans. The fast-moving zombies are agile enough to climb on top of each other, creating scary mountains of flesh eaters who can quickly ascend tall walls or bring down helicopters

The film, based on Max Brooks' popular World War Z novel, hits theaters on June 21 and stars Pitt, Mireille Enos, David Morse and Matthew Fox. Its first trailer arrived in November