Same-Sex Marriage Ruling: See Celebrities Who've Come Out as Gay

It's a historic day for same-sex marriage!

This morning, the Supreme Court of the United States struck down the Federal Defense of Marriage Act and dismissed a defense case for Proposition 8, a huge victory for gay and lesbians across the country.

"Today's DOMA ruling is a historic step forward for #MarriageEquality. #LoveIsLove," President Barack Obama tweeted after the big announcement today.

The Clinton-approved DOMA defined marriage as a legal union between a man and a woman and absolved states from having to give the same rights to gay couples as enjoyed by heterosexual couples. And Prop 8, of course, was the 2008 ballot measure in California that outlawed same-sex marriage.

Obama wasn't the only big name to react to the great news. "Big news from the Supreme Court. Goodbye #DOMA #Prop8. Hello #equality," Ben Affleck tweeted, while Leonardo DiCaprio shared, "Historic day. Well done #SCOTUS. RT @GLAAD: Supreme Court affirms that #DOMA is unconstitutional!" Demi Lovato posted, "Gay, straight, lesbian, bi.. No one is better than any one else. What an incredible day for California AND for equality," and Lena Dunham tweeted, "First Wendy, now DOMA gets the boot! Sometimes things are really great." And SNL funnyman Seth Meyers shared, "DOMA And Prop 8 should get married."

California is now the 13th state where gay marriage is legal, joining Connecticut, Iowa, Vermont, New York, Delaware, Rhode Island, Minnesota, Washington, Massachusetts, Maryland, New Hampshire and Maine, along with Washington, D.C.

In celebration of marriage equality, we'd thought we'd take a look at the many Hollywood stars who have come out as gay. From trailblazers like Melissa Etheridge and K.D. Lang to more newly out names like Anderson Cooper, Zachary Quinto, Jason Collins, Glee star Charice and Frank Ocean, check out these proud celebrities.

And don't forget to check out what gay and straight stars alike are saying about the big ruling.