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."
Wisconsin business offering 'therapeutic cuddling' forced to close
Exploding whale video goes viral on Internet