Heidi & Spencer

TMZ caught the newly-engaged "Hills" brats leaving Les Deux in Hollywood last night, where they constantly held hands and chatted up the photogs snapping their picture on their way to the valet. They sure do love attention each other!

Spencer joked that all the attention coming their way was due to a lack of anyone else to shoot, saying "Justin and Cameron must be at home." He's right. Though the two kept talking to every camera they could, Spencer did manage to keep his wedding date a secret, saying, "Every day is a big day, it's good to be alive."

Wouldn't want to jinx that now would we?

Take a moment to enjoy their pre-planned "spontaneous" paparazzi photo op.

Don't worry folks ... the clock is ticking on these two.

Stop what you are doing. This is a moment you will remember forever. MTV's "Hills" stars Heidi Montag and Spencer Pratt have done it. They're engaged. For now.

As Us Magazine just reported, the "world's best boyfriend" popped the question to his 20-(yes 20)-year-old fiancee last night in Santa Barbara. Obviously, she said yes.

According to Us, Pratt picked up a diamond encrusted platinum band at Zales a jewelry store in Brentwood, Calif.

Heidi's hills nearly spilled out of her pink floral bikini as she frolicked in the chilly surf with boyfriend Spencer Pratt ... who later went mountain climbing.

Yodel-ay-ee-oooo!

In the new issue of Us Weekly, Montag also says that the reason she never called LC after news broke of the sex tape, which may or may not exist, was because Heidi was in the hospital recovering from her nose and boob jobs! Priorities, people! When asked if the sex tape, which may or may not exist, does in fact exist, Montag said, "No comment."

As far as her relationship with boyfriend/"Hills" resident slimeball Spencer Pratt is concerned, Heidi says, "It's perfect. We have so much fun. I never knew I could love someone like this." While Pratt chimes in saying, "I have never been so madly in love as I am with Heidi. She has the world's greatest boyfriend."

There's no question these two were made for each other.

Lauren Conrad has named a former friend as a culprit in spreading rumors of a sex tape featuring the "Hills" star and her ex, multi-arrestee Jason Wahler. The annoyed LC denies the existence of the tape.

In an interview with Us magazine, sources close to LC say she's "pointing the finger" at former friend Heidi Montag and BF Spencer Pratt, because Montag was the "one person who didn't reach out" after news of the tape broke. Watch your back in them thar Hills!

Montag and Pratt denied any wrongdoing ... and so far, no sex tape has surfaced.