Brad Pitt, Angelina Jolie breaking up?

New York (ANI): Hollywood's hottest couple Brad Pitt and Angelina Jolie are on the road to break-up, according to a new biography. In his new book, 'Brangelina: The Untold Story of Brad Pitt and Angelina Jolie', author Ian Halperin has revealed that the couple, who fell in love on the sets of Mr and Mrs Smith, now argues like cats and dogs on everything from politics to clothes the kids wear and Brad's 'atrocious habit,' which includes pot smoking and alcohol."

"I talked to several people in Brad's family who wished they'd break up today. They're scared for Brad's safety and his well-being," the New York Post quoted Halperin as saying. A limo driver who drove Brangelina frequently witnessed them "going at it in the back seat" twice and saw a "U-turn" in their relationship in 2007.

"I was more worried about his safety than hers," said the driver. "She really flew off the handle, threatening him and lashing out at him. I can't imagine how anyone would want to be with her every day, no matter how sexy she is. She has a temper like a cobra," he added.

The tome reveals that Pitt may have cheated on Jolie. The most persistent story that crops up time and again involves Pitt and a beautiful Sudanese model, Amma, whom he met at a benefit for Darfur at the 2007 Cannes Film Festival. Jolie has allegedly accused Pitt of cheating on her. Pitt's pot use is also building tension in the couple's relationship.

A woman who works for an industry publication says Pitt's drug use will give Jolie an easy way to explain their split, when it inevitably happens: "They'll be split within 18 months, probably sooner," she said.

"And here's how it's going to play out. 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. She's worried about the kids, and she's afraid it's not the right environment for them. Maybe he'll even take part of the blame and go along with that," the woman added.