In this $250 million blockbuster movie, Brad Pitt plays a United Nations employee trying to stop a zombie takeover. A combination of thousands of extras and CGI technology made this zombie apocalyptic movie quite the action thriller. Even the actors had some terrified moments on set.

This behind-the-scenes look gives us insight into the production from the elaborate (time-consuming) makeup for all of the extras to the amazing CGI and graphics. We also get to hear the director talk about his vision for the movie and the challenges he faced while making it. Check it out!

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Check out the full behind the scenes video from etonline.com and don’t forget to look for World War Z in theaters June 21!