Celebrities present at Williams and Van Veen’s sunset nuptials included Girls creator Lena Dunham, Katy Perry, John Mayer, Bruce Springsteen, Seth Meyers and wife Alexi Ashe, Diane von Furstenberg, Andy Cohen and Tom Hanks and wife Rita Wilson, who plays Williams' mother on the acclaimed HBO comedy.
Williams' co-star Zosia Mamet was spotted arriving at the Denver airport with boyfriend Evan Jonigkeit on Friday.
Another one of Williams' Girls co-stars, Gaby Hoffman, offered her congratulations. At Entertainment Weekly's Emmy Award Pre-Party on Friday, Hoffman told ET she wished the couple "patience, love, and understanding."
The wedding date was actually postponed a few months in part because of the scandal surrounding the 27-year-old actress’ father, former NBC Nightly News anchor Brian Williams.
"It’s been a very full year," she admitted to Meyers at New York’s 92Y in February. "You sort of think, 'What could possibly come along that would make me not think about [my wedding]?' And then I get Peter Pan and I think, 'OK, I will think only about Neverland and then we’ll go back to planning our wedding.'"
"And then current events started happening and so that derailed it a little bit," Williams added. "It’s just something we haven’t focused on, but, spoiler alert, we are excited!"