Gossip Girl: Vera Wang Takes Us Behind the Scenes of Tonight's Gorgeous Wedding!

Talk about a fairy-tale wedding!

Tonight's 100th episode of Gossip Girl features Blair Waldorf (Leighton Meester) walking down the aisle, and suffice to say, it's possibly the most divine-looking wedding party TV has ever seen. So how'd they do it?

We chatted exclusively with Gossip Girl wardrobe designer Eric Damon and the designer of all the girls' gowns, Vera Wang, for all the scoop, along with a detailed look at Blair's two wedding dresses!

More: Here Comes the Blair! Watch Leighton Meester Walk Down the Aisle in Tonight's Episode

Wang makes an appearance in tonight's wedding episode and cracks that it's "the beginning and end of my television career!" She admits to repeatedly flubbing her lines and says with a laugh, "I don't know, maybe I was just so in awe of looking at Leighton in the dress. She kind of just blew my mind away when she first walked onto the set!"

As revealed in our first look at Blair walking down the aisle, she does make quite the mind-blowing impression. (Do not watch while operating heavy machinery!) And for you who are wondering whether she actually says "I do" to Prince Louis, I can't give anything way, but let's just say I personally was surprised!

Blair and Serena's (Blake Lively) dresses—which were designed by Vera (a self-professed, longtime Gossip Girl fan) and chosen by G.G.'s stylist extraordinaire, Eric Damon—were specifically chosen to suit their personalities.

"Blair Waldorf is an American princess," Damon explains. "So for me, [her wedding dress] had to be very tailored and very modern, but also have a very classic kind of Old World sense to it." He reveals they struggled deciding between two dresses, and in the end, spoiler alert: They were able to use both on the show.

MORE: When—and How—Will Gossip GIrl End? The Show's Boss Weighs In

"I couldn't take my eyes off of her," Wang tells us. "I think what Leighton brought to the wedding gowns was a very easy sensibility to dress as if it were very couture, and that's what I strive for with every fashion show and every red carpet outing."

Check out our detailed look at all the bridal gowns in the exclusive video above!

And to find out whether Blair seals the deal, check out Gossip Girl's 100th episode tonight on the CW. I'll also have some fantastic exclusive scoop posting right when the episode finishes airing, so be sure to check back tonight!

PHOTOS: Whirlwind Weddings