Lauren Conrad Celebrates Heidi & Spencer

The Hills cast is growing up so fast--not only did Heidi Montag officially become Spencer Pratt's bride yesterday, but the couple's once-nemesis Lauren Conrad even found it in her heart to turn up to Pasadena, Ca. to watch the ceremony.

Reports say Conrad showed the Westminster Presbyerian Church Saturday afternoon to watch the couple exchange I Do's, Heidi in Monique Lhuiller and Spencer in a tux by Zegna, alongside their fellow castmates Lo Bosworth, Audrina Patrdige, Justin Bobby, Brody Jenner and his girlfriend Jayde Nicole.

Heidi's sister Holly and Spencer's younger sis Stephanie served as bridesmaids in yellow silk chiffon numbers, while Spencer opted for two non-bold-named guys to stand with him.

The proceedings were adult and nearly a total class act (skywriters were spotted following the ceremony writing promotional messages for Montag's music on iTunes), but no one parties like The Hills kids.

Two different receptions were held, the first reportedly at Los Angeles venue Social Hollywood. Guests were treated to margaritas and passed tuna tartar. Heidi changed into a short white dress for the spring themed bash.

Afterwords, a more intimate (yes, the two are capable!) celebration was had at a clear fave of the couple's, Wolfgang Pucks steak eatery Cut in Beverly Hills. The duo had their rehearsal dinner there on Friday evening, as well.

Conrad is said to have attended neither.

Rest assured, the wedding will be televised. MTV said in a statement that later this season, all viewers will get a front row seat to the Speidi nuptials. We're sure they wouldn't have it any other way.

(Photo: Film Magic)