Brad Pitt and Jennifer Aniston were one of Hollywood's power couples until the former fell in love with Angelina Jolie on the sets of their film Mr. and Mrs. Smith. Soon after, Brangelina became the global trendsetters for couples world over, leading to a marriage and six children down the line. But the couple separated in 2016 and Brad underwent therapy which has led him to the realisation that he should have never left Aniston in the first place, revealed a source.