Prometheus screenwriter Damon Lindelof is set to rewrite Brad Pitt's movie production World War Z.

Pitt shot the post-apocalyptic horror film in various locations around Europe last year, but Lindelof has been called in to fix some problems with the first cut.

According to Total Film, Lindelof is said to be concentrating on the film's third act which reportedly needs "serious" restructuring

The motion picture sees Brad portray the role of a United Nations fact-finder and family man who travels around the world to visit survivors of a zombie apocalypse which is referred to as World War Z.

The December 2012 release date has been pushed back to summer 2013 to allow for six to seven weeks of reshoots in September and October.