The 11-year-old was given a small role in the apocalyptic thriller alongside his dad, who admits his son was eager to get on set and join in the action. He tells People.com, "He's got a small piece in it [the movie]. He's a zombie who then gets shot. I don't know what that says about my parenting!"
Abigail Hargrove, who plays Pitt's on-screen daughter in "World War Z," adds of Maddox's cameo, "I remember one day he was talking to his dad, Brad, and I remember him talking about how he had to shave off his mohawk because he had to play one of the zombies, and I was like, 'No! Not the mohawk!' But he was very excited to be a zombie. Definitely."