Ryan Seacrest: "Ballot filled out, just gotta drop it off after work. #ivoted #almost"
Jennifer Lopez: "Today is Election Day! Find your polling place in all 50 states! Just go to http://vote.barackobama.com #VOTE"
Director, choreographer, producer Adam Shankman: "I'm in line and waiting to #VOTE! So freaking excited to be a part of my countries process! #GodBlessAmerica :)"
Grey's Anatomy creator Shonda Rhimes: "I love hearing how you all are out there voting today! Voting is very sexy and terribly dreamy..."
Greg Grunberg: "Obama Romney Obama Romney Obama Romney Obomney Robama Obama Romney#VOTE #VOTE"
Lenny Kravitz: "I voted. Go #vote"
Ming-Na Wen: "New Yorkers & New Jersey voters waiting an hour or more in lines to vote. Even #Sandy can't deter these patriotic Americans! YEAH!"
George Lopez: "May we continue to enjoy the Freedom to Attack each other in 140 characters or less #vote"
Nicky Hilton: "It's Election Day, America! Get out there and vote!"
Gabrielle Union: "DO NOT TAKE/POST PICS OF YOUR BALLOT!! Pics in line or after with your sticker is fine but NOT of your ballot! Pls RT"
Pete Wentz: "how is election day in the u.s. not a holiday from work for people who need it?"
Ivanka Trump: "Voting! #electionday #vote #Election2012"
Chelsea Handler: "Pls vote everyone. It took me 10 minutes."
Diablo Cody: "I live across from the local polling station, so friends are dropping by. It's like a sitcom! Or an unpopular web series!"
Kim Kardashian: "Did everyone get out and vote???"
Conan O'Brien: "Regardless of who you're voting for today, do the right thing & write me in for Michigan Drain Commissioner. The madness must stop."
Katie Couric: "Getting my ballot!"
On Facebook, Lauren Conrad quickly got more than 500,000 likes for her post that read: "Like this if you voted today!"