The Supreme Court of the United States has struck down a ban on gay marriage.
This now clears the way for same-sex marriages right across the US.
The vote was passed by a majority of five-to-four.
Several states had a ban in place, but this has now been ruled unconstitutional.
The court says individual states cannot ban same-sex couples from getting married, and says the Constitution requires states to marry two people of the same sex.
It also says each individual state must recognise the marriages offered by other states - meaning gay couples who have already married in one state now have national recognition for that marriage.
The ruling means that gay marriage is a right there nationwide.
Welcoming the news on Twitter, US President Barack Obama said the ruling marked "a big step in our march toward equality. Gay and lesbian couples now have the right to marry, just like anyone else."
Today is a big step in our march toward equality. Gay and lesbian couples now have the right to marry, just like anyone else. #LoveWins
— President Obama (@POTUS) June 26, 2015
Democratic Presidential hopeful Hillary Clinton said she was "Proud to celebrate a historic victory for marriage equality".
Proud to celebrate a historic victory for marriage equality—& the courage & determination of LGBT Americans who made it possible. -H
— Hillary Clinton (@HillaryClinton) June 26, 2015
While the White House tweeted this simple tribute:
#LoveWins. pic.twitter.com/s5aiwIsFz8
— The White House (@WhiteHouse) June 26, 2015
Responding to the news, Colm O’Gorman, Executive Director of Amnesty International Ireland said:
"Coming just over a month since Ireland’s referendum on marriage equality, this is another historic day for human rights.
"For more than two decades LGBTI and human rights activists have been campaigning for marriage equality in the United States.
"Today’s decision by the US Supreme Court marks the end of that long battle and a final victory for those who have tirelessly campaigned for so very long."
Not all were best pleased, and dissenting judge Antonin Scalia's scathing footnotes have been garnering much attention:
WOW at the tone of this footnote in Scalia's dissent. pic.twitter.com/ob3mm9c1UD
— Taniel (@Taniel) June 26, 2015
Republican Governor of Louisiana and recently-announced presidential hopeful Bobby Jindal had this to say:
Marriage between a man and a woman was established by God, and no earthly court can alter that. http://t.co/1Kfw9l0KMG
— Gov. Bobby Jindal (@BobbyJindal) June 26, 2015
