LOS ANGELES: Hollywood's hottest couple has made it official, with Brad Pitt proposing to Angelina Jolie after six children and years of unwedded bliss, a spokeswoman said.

"Yes, it's confirmed," Pitt's manager Cynthia Pett-Dante told People magazine. "It is a promise for the future and their kids are very happy."

She said no date had been set at this time, and there was no word of the wedding's location.

The news put an end to months of speculation about the couple and their plans to marry.

Jeweler Robert Procop designed Jolie's engagement ring in collaboration with Pitt, and confirmed the news.

The famous Beverly Hills jeweler, who has designed an entire collection inspired by Jolie, worked on the ring for a year.

Pitt "wanted every aspect of it to be perfect, so Robert was able to locate a diamond of the finest quality and cut it to an exact custom size and shape to suite Angelina's hand," the jeweler said in a statement.

"Brad was always heavily involved, overseeing every aspect of the creative design evolution... The side diamonds are specially cut to encircle her finger. Each diamond is of the highest gem quality."

Pitt, 48, and Jolie, 36, became close on the set of 2005 film "Mr. and Mrs. Smith." They have three biological children together and adopted three others, and Pitt apparently caved after pressure from the kids.

"We'd actually like to," Pitt said of making Jolie his wife, "and it seems to mean more and more to our kids."

"We made this declaration some time ago that we weren't going to do it till everyone can," he added in a January interview with The Hollywood Reporter, in a reference to the legalization of gay marriage.

"But I don't think we'll be able to hold out. It means so much to my kids, and they ask a lot. And it means something to me, too, to make that kind of commitment."

Jolie had also stoked the media firestorm when she told ABC News in December that "the kids asked me the other day, and I asked them if it was just because they wanted to have a big cake."

"I explained to them that our commitment, when we decided to start a family, is the greatest commitment you can possible have. Once you have six children, you're committed," she added.

Last year was very busy for Jolie, with the release of "In the Land of Blood and Honey," a Bosnian War tell that marked her directorial debut.

And Pitt has taken a pause from the frenetic pace of his film career to spend a bit more time with Jolie and their children.

"It's family first. This year, I needed to spend more time with my family so I spent more quiet time developing stuff," he told AFP in February.

Earlier this year, Jolie raised eyebrows, and probably temperatures, by exposing a thigh in a gown with a full-length slit while presenting one of the Oscars show in Hollywood.

Within less than an hour someone had created @AngiesRightLeg -- subhead: "I am Angelina Jolie's right leg" -- and by morning the Twitter feed had more than 15,500 followers.

Jolie's directorial debut was a love story set in the Bosnian war. It tells the story of a Muslim woman and a Serbian man who have a fling before the war and meet again when she has been taken prisoner by a Bosnian Serb army unit commanded by her former lover.

This week it was announced that Jolie will play Maleficent, the villain from Sleeping Beauty, in a film due out in 2014.

Pitt was nominated for Oscars for last year's Moneyball, a story about baseball and money. He is to star in 2013 in "Twelve Years a Slave," about a man kidnapped in New York in the 19th century and sold into slavery in the Deep South. AGENCIES