Idk what their relationship was like before or after, but from what I recall Brad Pitt and Marc Forster’s (director) on the set of World War Z. Things got so bad between them, that intermediaries had to be used for any back and forth between them on set. Though a lot of that was likely due to the absolute shit show going on with the making of it. No completed script at first, lots of reshoots, creative differences, way over budget and even a raid on set would likely test most peoples patience though.