Meanwhile, former Desperate Housewives star Eva Longoria was Instagramming up a storm while seated outside the White House.
"A year ago, I asked my sister Liza 'Who do you most want to meet in the world?' She said, 'the Pope,'" the actress shared with her 1.6 million followers. "And here we are!"
Michael Keaton was clearly moved by the pontiff's message to the masses. The actor Instagrammed on Wednesday morning: "His Coolness was great this morning and the President's introduction was beautiful. AND for all of you who will jump on the climate change bandwagon--we welcome you. It is a big and strong wagon."
Another wonderful moment captured was an image of several nuns tailgating ahead of the pope's arrival.
Even Kerry Washington couldn't hide her giddiness.
"Pope Francis might be my celebrity crush. #ImNotEvenCatholic," the Scandal star, aka Olivia Pope, tweeted.
Several others stars also shared how moved they were that the pope was visiting:
Comedians also didn't miss the opportunity to get in on the pope-palooza.
I can't believe the Pope is staying in my apartment tomorrow night? Should I get extra Bugles?
The White House is the pope's first stop during his U.S. visit. While in D.C., he will also be going to St. Matthew's Cathedral, and from there will hold a mass on the grounds of the Basilica of the National Shrine of the Immaculate Conception.