'Hills' co-stars wedding details revealed?

Details about the wedding of The Hills co-stars Heidi Montag and Spencer Pratt have reportedly been leaked.

The couple, who eloped to Mexico for a non-legally binding marriage last year, are reported to be tying the knot in a lavish ceremony in Pasadena, California, this weekend.

According to E! News, Montag will walk down the aisle in a $19,000 custom-made Monique Lhuillier dress, accessorised by nearly $1 million worth of jewellery on loan from Neil Lane.

The wedding reception will be held at the Regent Beverly Wilshire Hotel in Beverly Hills, with Pete Wentz, Ashlee Simpson, Perez Hilton and Michael Bublé expected to be among the 200 guests.

"They are not having a formal reception. Spencer just decided... He wanted it to be more intimate. He didn't want a super huge reception," revealed an insider.

Discussing the couple's honeymoon plans, the source added: "At first, they thought Four Seasons in Maui. But now they are looking at Tahiti, Fiji, possibly Europe."

Hills co-stars Brody Jenner, Audrina Patridge, Lo Bosworth and Frankie Delgado have been confirmed to attend, although Montag's former best friend Lauren Conrad has declined her invitation.

Earlier this week, show creator Adam DiVello confirmed that MTV would be filming the nuptials for a forthcoming episode of the scripted reality series.