Exes Jennifer Aniston and Brad Pitt dominated the news cycle when they acted alongside each other in the Fast Times at Ridgemont High table reading last week. Earlier this year, they just about broke the internet when they had an affectionate moment backstage at the SAG Awards. And behind the scenes, a source tells Us Weekly, the two have really become close friends—and just friends only. (Aniston is single while Pitt is “casually” dating German model Nicole Poturalski.)