Lady Gaga, Alec Baldwin, Tyra Banks and Josh Groban are among the celebrities cheering President Barack Obama's gay marriage support.

Obama on Wednesday told ABC News' Robin Roberts: “I've concluded that for me personally it is important for me to go ahead and affirm that I think same sex couples should be able to get married.”

The news quickly went viral on social networks.

Lady Gaga messaged to her nearly 24 million followers: “Obama, congratulations on being the first sitting President to support marriage equality. Feels like the future, and not the past. #NoFear.”

“Obama gets it right on gay marriage. Bravo,” 30 Rock's Alec Baldwin tweeted.

Tyra Banks added: “A fierce day for my gays and prez @BarackObama – way 2 stand up 4 luv for ALL!”

“Historic!! #equality,” Josh Groban messaged.

Samantha Ronson also applauded the president: “Better late than never!!!! Obama supports same-sex marriage.”

Adam Lambert, Jane Lynch, Neil Patrick Harris, Adam Levine, Ricky Martin, Chris Colfer, Cyndi Lauper and Ellen DeGeneres also cheered on the president.