Surprise! Brad Pitt shows up to screenings of 'World War Z'

Some movie goers got quite a surprise when Brad Pitt showed up, unannounced, at screenings of his latest apocalypse thriller World War Z.

In total, Pitt showed up at four separate screenings Thursday in four entirely different cities.

They were (in order of appearance): Atlanta, Philadelphia (where he reportedly told fans “I just crushed a Cheesesteak next door”), Chicago and then Austin.

Here’s some video from the Chicago stop of the mini-tour, where Pitt threw T-shirts to cheering fans and said a few words before running off to make his next appearance in Austin.

World War Z opens later this month and tells the story of Pitt battling a global zombie pandemic.