The star greeted fans who turned out to see his new zombie thriller in Atlanta at 12 p.m., and then flew to Philadelphia for a 4 p.m. showing.
Pitt handed out t-shirts to the audience members, and was just an all-round cool dude.
He told the crowd in Philly, “I just crushed a cheesesteak next door.”
Last month, Pitt surprised movie-goers in Hoboken, New Jersey.
World War Z opens on June 21.
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