Pitt's Plan B Entertainment bought the rights ages ago, and it's just always been assumed that he'd star in "World War Z," but confirmation came from author Max Brooks, who told MTV the news while autographing his books at Comic-Con.
From the book's official website comes this handy description:
Told from the perspective of numerous survivors from all over the world, from Denver to South Africa, Sydney to Yonkers, Malibu to India, WORLD WAR Z captures the sacrifices and, toward the end, the ingenuity of our race to defend and save our cities, towns, and villages from a plague that seemed virtually impossible to stop.
Brooks also mentioned that Paramount has optioned two more of his undead epics, "The Zombie Survival Guide" and "The Zombie Survival Guide: Recorded Attacks."
"I can't believe how cool Paramount has been to me and these projects, and how cool Plan B has been," Brooks told MTV.
Bring on the zombies, Brad.