Actors Angelina Jolie and Brad Pitt arrive for the world premiere of the film "World War Z," in which Mr. Pitt stars, at a central London cinema on Sunday, June 2, 2013. (Joel Ryan/Invision/AP)

Photo by: Joel Ryan

Actors Angelina Jolie and Brad Pitt arrive for the world premiere of the film "World War Z," in which Mr. Pitt stars, at a central London cinema on Sunday, June 2, 2013. (Joel Ryan/Invision/AP)