On Sunday Katherine Heigl, 29, married Josh Kelley, 27, her boyfriend of two and a half years. The pair met on a video shoot for Kelley’s song, “Only You,” and Kelley proposed about a year later. Several of Katherine’s “Grey’s Anatomy” costars were on hand to witness the event, including Justin Chambers, Kate Walsh, Sandra Oh, and T.R. Knight, who served as a groomsman. Despite the December 23rd date, the wedding was held outside in chilly Deer Valley, Utah. The ceremony took place under a heated tent.

“The 30-minute ceremony was officiated by Unitarian minister Tom Goldsmith and was followed by a reception nearby. Heigl wore an Oscar de la Renta gown and walked the aisle to a song specially composed by Kelley, according to OK! magazine, which was granted exclusive coverage of the nuptials. Knight told People magazine afterward that the occasion was both “incredible and beautiful.”

While Heigl had been feeling the pressure that comes with handling all those last-minute wedding details, even imploring an E! News reporter at one point to help “fix my seating chart,” the ceremony seemingly went off without a hitch. “You have a fantasy of this big day, this big moment and the sentimental aspect of it,” the bride-to-be told Entertainment Tonight last week, “but I think at the end of the day, I find there is a different level for both of us to the relationship. It is important to honor our families and honor the tradition, to stand up in front of all of these people and say, ‘It’s you and me, and that’s it for life.’ I hope I can just chill out—somebody might need to slap me!”

[From E! News]

Gray’s costar Patrick Dempsey had previously told several news outlets that he wouldn’t be attending Katherine’s wedding, since he wanted to spend Christmas with his children. I think it’s in slightly poor taste to hold your destination wedding two days before Christmas. It’s kind of insinuating to the guests that your wedding is more important than them spending Christmas with their families – or best case scenario, that they should completely alter their holiday plans for you. Many weddings take place during December. It’s a great way to take advantage of already existing nice holiday décor that you don’t have to pay for – though I doubt that was Katherine’s motivation. But you can do it earlier in the month. Having guests choose between their own holiday plans and your wedding seems a little inconsiderate to me. I am shockingly uptight about wedding etiquette. And also a little uncomfortable and grumpy from a large Christmas meal. So between the two, poor Katherine Heigl didn’t stand a chance today. Katherine, hold your next wedding before December 20th, okay? I mean, congratulations to the happy couple.

Picture note by Celebitchy: Katherine Heigl and Josh Kelley are shown at the Knocked Up premiere on 5/22/07, thanks to PRPhotos.