Update: PIC: See Molly Sims' Gorgeous Wedding Dress!

Despite having less than four months to plan, celebrity wedding planners Yifat Oren and Stephanie Cove didn't skimp on any details when it came to creating Molly Sims' perfect fairytale ceremony.

The supermodel/actress tied the knot with movie producer Scott Stuber at the Frank Cafaretta Vineyard in Napa Valley, Calif. on Saturday evening in front of close family and friends.

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A source tells Us Weekly, "the ceremony was underneath a grove of trees beside a small lake. There were flowers in bowls hanging from the trees and it was an incredible setting. The wedding started at 6pm. Molly walked down the aisle with her dad across a huge lawn." See more pics of Molly's gorgeous wedding dress from PopSugar.

The 38-year-old bride pinned her hair in a high bun with a veil attached at the back. The gown that was incredibly flattering to her supermodel figure: fitted through the bodice, which then flared out at the knees. "It had a lot of lace -- it was amazing and she looked ethereal," the source says.

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The happy couple, who dated for a year and a half before Stuber, 42, popped the question in May, were very relaxed and romantic at the alter while exchanging vows.

"During the ceremony, [Molly and Scott] laughed a lot and kissed a few times. It was very sweet," the source tells Us. "When they were pronounced husband and wife, Molly threw her hands up in the air and gave Scott a long kiss. Everyone was cheering and screaming for them. They looked ecstatic as they walked back up the aisle."

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Celeb guests included Black Eyed Peas frontwoman Fergie and her husband Josh Duhamel, who co-starred with Sims on the now defunct NBC show Las Vegas. Vince Vaughn, who starred in the Stuber-produced flick The Break-Up, also attended with his wife Kyla Weber.

"It was an incredible weekend for everyone," the source adds. "They stayed at the Solage Calistoga Resort and had a party at the Napa Valley Wine Reserve on Friday night. Everyone was saying it was the greatest wedding they had ever been to."