I don't remember any Brad Pitt movie about gypsies.
I don't remember any movie either. The travelers are that band of cons that were in the Spokane/Stateline/CDA region several years ago. They would get some elderly people to pay to have the roofs or driveways redone and they cons would take the money and never do the work. They also marry off the kids at an extremely early age in elaborate ceramonies. They teach the art of the con/swindle to the kiddies and create miniature cons at an extremely young age.
A while back there were numerous specials about the Travelers as well as cult definitions, etc.