Kim Kardashian and Kris Humphries Are officially Married

In May, the 6' 9" tall basketball star proposed to Kim at her Beverly Hills home by spelling out "Will you marry me?" in rose petals on the reality star's bedroom floor - catching his future-wife off guard.

"I didn't expect this at all," Kim told People of Kris' proposal at the time. "I was in such shock. I never thought it would happen at home, and I never thought now."

And now Kim Kardashian and basketball star Kris Humphries were married this evening at a private estate in Montecito, Calif., surrounded by friends and family, E! News and People exclusively confirm.

The couple exchanged vows in front of approximately 440 guests, including Demi Lovato, Babyface, Mario Lopez, Maria Menounos, Sugar Ray Leonard, Mark Ballas, Avril Lavigne, Lindsay Lohan, and Kathy Lee Gifford at the private estate of venture capitalist Frank Caufield in Montecito, California.

The bride wore a custom Vera Wang gown, while the groom looked spiffy in an Ermenegildo Zegna tuxedo with a white jacket and tie. Husband and wife exchanged Lorraine Schwartz wedding bands, the same designer behind Kim's 20.5-carat engagement ring.

In a stylish accent that we can only describe as "very Pippa," Kim's sisters all wore white Vera Wang bridesmaid dresses. Humphries' groomsmen, including brother-in-law Rob Kardashian and Lamar Odom, suited up in black Zegna tuxes, as did Bruce Jenner and Kris' dad, William Humphries,

Self-proclaimed "momzilla" Kris Jenner, who has now watched two of her little girls walk down the aisle, also donned Vera Wang for the occasion.

But while it seems as if the Kardashians and Jenners could account for a few hundred people themselves, there were plenty of other familiar faces sitting in those chairs.

Guests included Lindsay Lohan, Eva Longoria, Ryan Seacrest and Julianne Hough, Mel B, Brittny Gastineau, LaLa Vazquez and Carmelo Anthony,Sugar Ray Leonard and The Spin Crowd's Jonathan Cheban, many of whom had tweeted beforehand about how excited they were for Kim's big day.

Members of the New Jersey Nets were also given the all-clear to gather in one place for a good cause, despite a rule that prevents teammates from being in contact during the NBA lockout. And that's especially nice, because Jordan Farmar, Humphries' current Nets cohort and Odom's former Lakers teammate, is only the guy who introduced the bride and groom!

The multipart festivities had been cloaked in confidentiality from the start—minus the fact that a camera crew was often on hand for E!'s exclusive behind-the-scenes wedding special (airing in two parts on Oct. 9-10)—from the day the $250 invitations arrived swearing guests to secrecy (and a black-and-white wardrobe) to the not-until-go-time reveal of Kim's gown.

In a KIIS-FM interview with Seacrest yesterday, Kim had expressed surprise over how calm she felt—though she admitted to already freaking out over "everything and anything" about a week ago.

While the newlyweds are forgoing an exotic honeymoon for now, the party sure isn't over. Mr. and Mrs. Kris Humphries and their guests will cap off the night with a lavish reception nearby. Kim said that she was hoping all of her guests would appreciate how "fun and glitz and glam" the night was going to be. "It will be so intimate, and so...really heartfelt. And they will think, 'Oh my God, that dress.'"

Exclusive details on the wedding blowout of the year are still to come!

E! Online is your destination Sunday for exclusive video and wedding details, plus tune into a special edition of E! News at 6 p.m. ET/PT. Official photos from Kim's big day will debut in the Sept. 5 issue of People, on sale nationwide this Friday.

Here's what some celebrity had to say  "Only a few hours to go till @KimKardashian gets married!!! So excited for her!!! Ahhhhhh," Brittny Gastineau.

"2Day is Princess Kimmies Day! Ow! So excited and happy for her! Will be a beautiful day indeed!" Ciara.

"Just hours to go @KimKardashian! Getting so excited, just wait until everyone sees.....xxVera," Vera Wang.

"getting my 'hair did' for my friends big wedding today,can't wait,i no i'm gonna cry fro happiness for her,yippee!!" Mel B.

"15 min nap...then almost time to get ready for my best freinds wedding! So happy for her!!!" Jonathan Cheban.

"So excited for @kimkardashian wedding tomorrow! Gonna see my sister @lorenridinger now!" wrote Eva Longoria.

"Butterflies in my stomach for @KimKardashian & @Krishumphries...beyond excited for today! the Anthonys are on our way! Love is in the Air!" LaLa Vasquez.

"I am so excited to have a new addition ( @KimKardashian) to Team Hump today! Today is going to be a blast!!" Kaela Humphries.