Heidi And Spencer's Wedding: Behind The Scenes

What you didn't see at the 'Hills' wedding, from Lauren Conrad's appearance to Kristin Cavallari catching the bouquet.

On Saturday, Heidi Montag and Spencer Pratt finally wed at the Westminster Presbyterian Church in Pasadena, California, where friends and family gathered to see the pair marry after two false starts late last year. And all their "Hills" friends were on hand to wish them well, including Heidi's former BFF, Lauren Conrad.

Lauren had previously said that attending the wedding of her frienemy Heidi was not in her plans, but it looks like the "Hills" star had a change of heart. LC's appearance was short but sweet in a purple mini-dress.

Fans gathered outside the church to catch a glimpse of their favorite "Hills" couple, as well as their friends Brody Jenner, Justin Bobby, Stephanie Pratt and Audrina Patridge. And Spencer didn't leave any detail out. In addition to having a skywriter write "Spencer Loves Heidi" above the church, he also used it as an opportunity to push Heidi's music career by having "Heidi's #1 Hit on iTunes" written in the sky.

The couple finally said "I Do" on Saturday evening, with Conrad making a quick exit before anyone else out of the church. Soon after, Speidi — along with their guests, who threw rose petals at the couple — made their way out of the church. After a few celebratory kisses, Heidi threw the bouquet from the church steps. When "Laguna Beach" star Kristin Cavallari caught the bouquet, Heidi warned her, "You're next!"

After sharing another kiss, the newlywed couple sped off in a Rolls-Royce Phantom. On Monday (April 27), Heidi took to her Twitter page to react to her new status as Mrs. Pratt.

"Wow, what a morning!" she wrote. "Waking up with my husband is beyond words!!! I'm so excited I'm really married! FOREVER! ... Just enjoying married life!! Getting married has been the craziest yet best experience of my life. I can't believe I am Mrs. Pratt. I'm so excited."