President Barack Obama has affirmed his belief that same sex couples should be allowed to wed, according to ABC News, and many celebrities and media personalities have been celebrating the news on Twitter.

Obama, who until today has said he believes marriage should be legally defined as that between a man and a woman, explained to ABC's Robin Roberts — in an interview to air on Thursday's Good Morning America — that his views on the issue have evolved.

"I have to tell you that over the course of several years as I have talked to friends and family and neighbors, when I think about members of my own staff who are in incredibly committed monogamous relationships, same-sex relationships, who are raising kids together; when I think about those soldiers or airmen or marines or sailors who are out there fighting on my behalf and yet feel constrained, even now that 'don't ask, don't tell' is gone, because they are not able to commit themselves in a marriage, at a certain point I've just 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," Obama said.

Since the news broke Wednesday afternoon, Twitter and other media outlets have been buzzing with support and enthusiasm. Here are just a few Tweets from celebrities who have spoken up:

Jane Lynch: "Obama: Marriage? Gay is Okay!"

Ross Mathews: "OMG, it's official! Obama becomes 1st president to support gay marriage!!! Historic day!"

Piers Morgan: "BREAKING NEWS: President Obama just endorsed gay marriage. One small step for him… one giant leap for mankind."

Perez Hilton: "Better late than never! @BarackObama lends his support to same-sex marriage! Equality for ALL!"

Andy Cohen: "THANK YOU MR. PRESIDENT"

Ellen DeGeneres: "Thank you President @BarackObama for your beautiful and brave words. I'm overwhelmed."

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

Ricky Martin: "I applaud President @barackobama for affirming that ALL Americans should enjoy equal rights. Historic! I will be a very proud host on Monday"

Ricki Lake: "Love is love! #Marriageequality Thank you Mr. President @BarackObama"

Kim Kardashian: "Thank you, President Obama! No more living in the past!"

Fran Drescher: "So proud of our President who showed such leadership & the meaning of America's freedom 4 all!"

Jesse Tyler Ferguson: "With @MichelleObama & @JustinMikita permission I would like to marry @BarackObama right now!"