The couple started dating in 2005 and have six children together.
Pitt was previously married to actress Jennifer Aniston.
"Yes, it's confirmed," Pitt's manager Cynthia Pett-Dante told People.com Friday. "It is a promise for the future and their kids are very happy. There's no date set at this time."
Ohio crash that killed two caught on camera [VIDEO]
Couple calls 9-1-1 over missing hash browns; assault McDonanld's employees