According to Page Six, the Girls star and the College Humor co-founder flew a number of high-profile guests out to Denver, where they plan to trick everyone and then drive them to a secret location in Wyoming.
See more: The Most Shocking Celebrity Weddings
"The wedding is being kept so secret that guests are being asked to fly to Denver, where they will be picked up and taken to the location, which is thought to be somewhere in Wyoming," a source told Page Six. "The accommodations for all guests are being paid for and then many of the guests are flying to LA together for Sunday's Emmys."
As for those guests, it's an unsurprisingly loaded list of A-list celebs. In addition to Williams' co-stars Lena Dunham, Zosia Mamet, and Jemima Kirke, and of course her famed father, Brian Williams, other top names in attendance include Bruce Springsteen, Diane von Furstenberg and Barry Diller. Seth Meyers and his wife Alexi Ashe, Bee Shaffer, Andy Cohen, Tom Hanks, and wife Rita Wilson, will also reportedly be there. The source even believes that Tom Hanks will officiate!
This news comes at a very critical time for the Williams. In Feburary, the Girls star told Seth Meyers that due to her father's suspension, she will be holding off on getting married for some time. "This has been a really hard time," she told Meyers during a Q&A at the 92Y. "Obviously [it's] toughest on my dad, who is sort of bearing the full burden of the responsibility for it ... Current events started happening so that derailed [wedding plans] a little bit." With Brian Williams set to return to the airwaves on MSNBC this Tuesday, this celebration couldn't come at a better time.
We'll be keeping our eyes open for any further details!