World War Z is currently filming and if you've been keeping up with the latest news, you'll know that the movie has quite a few changes from the original Max Brooks novel. Some of the changes are minor, such as the speed at which the zombies move, while bigger changes involve putting the main character (Brad Pitt) in the middle of the action.

World War Z director Marc Forster recently spoke with MTV News and talked about these changes: "The idea, obviously the book is not written as a narrative, you try to take things from the book, but at same time you're changing certain things... I do feel we're trying to keep it in the spirit of the book because it's important.

We are doing our own film, telling our own story because we had to... But trying to still include as much as we can from the book."

To hear more from Forster, watch the embedded video below. World War Z will be released on December 21, 2012 and stars Brad Pitt, Mireille Enos, Daniella Kertesz, James Badge Dale, and Matthew Fox.

Source: MTV News