Allison Williams' Oscar de la Renta Topped Off a 'Type A' Wedding Weekend

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Allison Williams married fiancé Ricky Van Veen, the co-founder of CollegeHumor, this weekend (see the proof right here). From the looks of things, it was exactly the wedding you'd expect from the girl who plays Girls' resident "type 'a'" karaoke genius.

In the interest of breathtaking perfection, the bride chose an all-American location at Bush Creek Ranch in Wyoming and wore a stunning atelier dress by Oscar de La Renta. According to sources, the guest list was also a super (type) a-list. Bruce Springsteen, Katy Perry, and Diane von Furstenberg were there alongside the Girls' contingent: Lena Dunham, Jemima Kirke, and Zosia Mamet.

John Mayer even showed up to serenade the couple, which totally would have made Marnie Michaels' big day.