Sean Penn looks for breathing room at Funny or Die party.

by contributor Brendan Knownacki

Last night fans of the comedy website Funny or Die gathered to celebrate The White House Correspondents' Dinner weekend with a mix of Washingtonians and Hollywood stars including John Hamm, Sean Penn, Chace Crawford, and Zach Galifianakis

Penn kept mostly to himself once he anchored in the corner of the packed VIP tent, causing a brief stir when he tried to push open the locked fence surrounding the venue. The crowd was shoulder-to-shoulder and it looked like Penn was ready to climb over the fence if it meant some breathing room. 

Also on hand was star of the upcoming Hangover Part II, who said he was "thrilled to be back" in DC as he maneuvered through the crowd. Cooper is an alumnus of Georgetown University, where he graduated with a B.A. in English in 1997.