NEW YORK – It’s official: Brangelina is engaged.

Brad Pitt and Angelina Jolie haven’t set a wedding date, but their engagement “is a promise for the future,” Pitt’s manager, Cynthia Pett-Dante, said in an email Friday.

Pitt, 48, and Jolie, 36, have six children together.

“Their kids are very happy,” Pett-Dante also said.

Jeweler Robert Procop worked with Pitt to design the ring. A news release describes it as featuring a long diamond amid a “galaxy of smaller stones.” It took a year to design.

The A-list celebrities have been partners since they began a relationship in 2005 while working on the film “Mr. & Mrs. Smith.”

The fact that Pitt was still married to Jennifer Aniston when he met Jolie added to tabloid fodder; Pitt and Aniston divorced in 2005 after five years of marriage.