Brad Pitt installs swear jar on set of 'World War Z'

Brad Pitt installed a swear jar on the set of 'World War Z'.

The hunky actor - who has kids Maddox, 11, Pax, nine, Zahara, eight, Shiloh, six, and four-year-old twins Knox and Vivienne with fiancée Angelina Jolie - tried to prevent cast and crew on the set of the zombie apocalypse movie from swearing in front of the youngsters who played his on screen daughters.