If you didn't know the Instagram star would show up with a hair-raising look (White Girl rosé in hand) then you clearly don't follow him on social media.
Get it, girl! The new mom wowed in a custom silver Banana Republic gown.
The Girls star didn't even need to do a twirl, her Rosie Assoulin dress had built-in flair.
Harley went with a ladylike off-the-shoulder frock.
Well suited, ladies! The duo rocked matching cream ensembles.
The designer wore one of her own colorful creations, naturally.
Clad in a Kim Mesches gown, the E! correspondent flashed a little leg.
From the abstract floral bodice to the silver scalloped print, this Creatures of the Wind dress is undeniably charming.
The Swarovski heir brightened up in a pretty pink gown.