Allison Williams is finally spilling secrets from her big day!
ET caught up with the HBO star at the Forevermark “A Diamond Is Forever” celebration in N.Y.C. Wednesday, where she opened up about her recent nuptials to College Humor co-founder Ricky Van Veen, 34.
"One of the most special things about the wedding was that it was actually very personal and very private," the 27-year-old told reporters of her Sept. 19 ceremony.
WATCH: All the Details From Allison William's Stunning Wedding!
"It was something that mattered to me in a sense of just wanting it to feel really intimate, and to feel like an experience that we shared as a family and with our closest friends," she continued. "I feel really happy about the fact that it was exactly that."
Roughly 150-200 guests attended the big day, including Girls co-stars Lena Dunham, Jemima Kirke, Zosia Mamet, as well as pals Katy Perry,John Mayer, Barry Diller, Diane Von Furstenberg, Bruce Springsteen and Late Night's Seth Meyers.
As for that stunning lace gown, Williams revealed that the process for finding the perfect white dress was a breeze. "Mine came together very organically [while] talking through it with the team at Oscar de la Renta," she said. "They totally got me."
The brunette beauty admitted that she looked to the 2011 royal wedding for a bit of inspiration. "Who didn’t look at Kate Middleton's and Pippa's dresses?!" the actress gushed. "Kate’s in particular, because it was actually bridal and [I thought,] 'Well, that’s just like perfection.'"
PHOTOS: First Look at Allison Williams' Custom Oscar de la Renta Wedding Gown
There was only one very specific requirement the Girls star had for her dream dress: "I wanted sleeves because I’m always cold," Williams, who was married in an outdoor ceremony in Saratoga, Wyoming, said. "And that was all I knew!"
And as for her new life as a newlywed, Williams confessed that things really haven't changed for she and Van Veen. "I thought I was going to wake up thinking I would have new hair or wings or something," she laughed.
"It's hard to articulate obviously — I'm sure other smarter people can put it better than I can!" she said, but then added, "It's so different and not at all different."