The White House Correspondents' Dinner is the only event where you'll see the stars from "The Walking Dead," "Game of Thrones" mingling with YouTube sensations, politicians, supermodels and yes, even the President of the United States.
It's one of the most random events of the year -- and last night's soiree was no different.
The stars turned out in their most killer couture for the so-called "nerd prom," with Chrissy Teigen showing some serious leg and some cleavage in a stunning Zuhair Murad gown. Seriously, how gorgeous does John Legend's wife look?
Naya Rivera used the occasion to show off her growing baby bump, glowing in a white Tadashi Shoji dress that accentuated her big belly. The "Glee" star and husband Ryan Dorsey are currently expecting their first child together.
Other red carpet stunners included "Orange Is the New Black" star Laverne Cox and Mrs. Channing Tatum herself, Jenna Dewan-Tatum.
But they were hardly the only ones who looked gorge!
"The Walking Dead" stars Alanna Masterson and Lauren Cohan proved they're both real beauties underneath all the zombie grime and dirt they sport on the his AMC series ... while their costar Normal Reedus (Daryl Dixon) cleaned up nicely in a suit.
Tea Leoni and boyfriend Tim Daly made their first public appearance as a couple at the event, while stars from shows like "Modern Family" and "Game of Thrones," as well as A-listers like Bradley Cooper were also in attendance.
One inside, First Lady Michelle Obama herself showed off her sleek style and a new 'do -- debuting some curly locks that looked absolutely amazing on her. We're living for this look, see it and more celeb sightings in the gallery above!