'World War Z' trivia and fun facts

Damon Lindelof and Drew Goddard rewrote the screenplay in the middle of the production to create a whole new different third act.

Ed Harris and Bryan Cranston were originally cast in the movie, but both dropped out due to scheduling conflicts.

A storyline that was deleted featured Gerry's wife having an affair with the para jumper from the helicopter from the rescue scene earlier in the film.

Max Brooks publicly stated that he felt the film had very little in common with his book beyond the central storyline.

In the book, 'Patient Zero' was originally from China not South Korea as it was in the film.

'World War Z' was the 13th biggest grossing film of 2013.