The days of Brangelina may be coming to an end, according to one writer who says that a Brad Pitt and Angelina Jolie split could be coming “within 18 months, probably sooner.”

“I talked to several people in Brad’s family who wished they’d break up today,” author Ian Halperin tells Page Six.

“They’re going to split amicably, work out some kind of arrangement with the kids, and everything will be very civilized.”

“Then you’re going to see unidentified friends leak stories how Angelina couldn’t put up with Brad’s partying and drinking and his pot smoking,” says Halperin, author of Brangelina: the Untold Story of Brad Pitt and Angelina Jolie.