Los Angeles, Apr 14 (IANS): Actors Brad Pitt and Angelina Jolie, who have been together since seven years, have finally taken their relationship a step further, and confirmed they are engaged.

"Yes, it's confirmed. It is a promise for the future and their kids are very happy," people.com quoted Pitt's manager Cynthia Pett-Dante as saying.

However, "there's no date set at this time," added Pett-Dante.

Jolie, 36, and Pitt, 48, have been together since 2005. They raise six children - Maddox, Pax, Zahara, Shiloh, and twins Knox and Viv.

Beverly Hills jeweller Robert Procop has claimed that he designed an engagement ring for Jolie, with inputs from Pitt. Jolie was spotted wearing her engagement ring this week.

"I can confirm that yes, Robert Procop did indeed design an engagement ring for Angelina Jolie, designed in collaboration with Brad Pitt," Procop's spokesman said.

A lot of thought is said to have gone behind the ring.

"Brad had a specific vision for this ring, which he realised over a year-long collaboration. He wanted every aspect of it to be perfect, so I 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," said Procop 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," he added.

Pitt was previously married to actress Jennifer Aniston, while Jolie has been wed twice before -- first to British actor Johnny Lee Miller and then to actor Billy Bob Thornton.