It’s Election Day and even celebrities are casting their votes.

Dozens of A-list celebs are backing President Obama's re-election. Bruce Springsteen, Jay-Z, Mariah Carey, Ricky Martin, Anne Hathaway, Scarlett Johansson and Eva Longoria have been deployed in vital must-win states to advocate on the president’s behalf.

Mitt Romney, on the other hand, boasts more big business and banking names on his roster rather than showbiz supporters. However, Kid Rock, Kelsey Grammar, Chuck Norris, Meat Loaf and Donald Trump are all backing the Republican candidate.

But whatever bubble they fill in today, many stars are using social media to urge their fellow Americans to make their voices heard.

Lena Dunham posted her election day outfit onInstagram and wrote: “Ladies, put on your voting best. May I plz see pics of your voting "looks"?” Page Six spotted the "Girls" star voting at Broome Street and 6th Avenue in SoHo.

Dwayne “The Rock” Johnson asked his Twitterfollowers: “Before I vote - final question.. who wakes up first and starts kickin' ass before sunrise? @MittRomney or @BarackObama #CINC”

Donald Trump, who posted a Facebook photo of himself casting a ballot, wrote “Me voting--- it really is my hair!”

Stephen Colbert joked, “Make sure you get out there and VOTE today! Then enjoy your orange juice and cookie... wait! Did I just give blood by mistake?”

Justin Bieber, just to remind us, tweeted “im 18...but i cant vote...im Canadian.”

Olympian Gabby Douglas is too young to vote but she’s in it for the treats. “Going w/my fam to the polls even tho I'm 2 young 2 vote...But theres always a kiddy poll which comes with a free ice cream coupon!” she wrote.

“Modern Family” star Eric Stonestreet’s sweet tweet: “Its important that u vote today. But also; don’t forget to feed ur goat, dock ur boat, secure ur tote, and to hang up ur long hooded cape.”

Chelsea Clinton boasted: "Best 45min wait ever. So exciting to see that my vote has been counted!! #Vote"

Yankees right fielder Nick Swisher encouraged his Twitter followers to vote. He posted, "#Vote No matter who you're voting for, make sure your voice is heard! I did!"

But the always colorful Ellen Barkin, who seems to have lost it again, tweeted "[Bleep] all this bull[bleep]...including my own. This year I'll be following the election via @TheOnion news site."