intro: Comedian Conan O'Brien took a break from his late-night show, "Conan," to join President Obama in Washington, D.C. Saturday at the 2013 White House Correspondents' Dinner.
Two hours or so before the festivities began, he sent out a picture of himself behind a podium, sporting a Boston Red Sox hat.
"Just rehearsed my routine to an empty ballroom at the Washington Hilton," the comedian tweeted. "The one guy unfolding chairs loved it."
PHOTOS: White House Correspondents' Dinner 2013