Brad Pitt and Angelina Jolie will give their children special gifts at their upcoming wedding.

The stars have reportedly commissioned a pendant engraved with their marriage vows for each of their six kids.

Like the A-List pair's wedding bands, the necklaces will be designed by star jeweller Robert Procop, the man behind Angelina's $160,000 engagement ring.

"Brad and Angelina are a very romantic couple," he told British magazine Grazia. "They knew they'd be together forever and get married one day now they've settled into a wonderfully strong family unit, and it's beautiful how in love they are."

While the jeweller didn't give away any details about the design of the rings, it has been claimed they will be studded with diamonds and also feature their wedding vows.

"Sources say that they are rumoured to have cost $500,000 each," Grazia reports.

Meanwhile, Angelina is said to want her ex-husbands Jonny Lee Miller and Billy Bob Thornton to attend the ceremony.

"Angelina has remained close to both Jonny and Billy, so they'd certainly be invited," an insider claimed.