Kim Davis, 48, will be jailed until she complies with a judge's order to issue the licenses.
A Kentucky clerk who refused to issue marriage licenses to gay couple has been ordered to go to jail.
U.S. District Judge David Bunning told Rowan County Clerk Kim Davis, 48, on Thursday that she will be jailed until she complies with his order to issue the licenses.
Davis, who was not put in handcuffs, said "thank you" before she was led out of the courtroom by a U.S. marshal.
Davis had refused to issue marriages licenses for two months since the Supreme Court legalized gay marriage, arguing that her Christian faith should exempt her from signing the licenses.
She told the judge she could not order the licenses because it would violate her conscience.
"You can't be separated from something that's in your heart and in your soul," she told him.
But Bunning said that the oath Davis took supersedes her beliefs.
The judge added that he did not think fining Davis - instead of jailing her - would force her to comply with his order to issue the licenses.
After she was jailed, hundreds of people outside the courthouse chanted: "Love won! Love won!"
Even the White House weighed in, saying that no one is above the law.
Press Secretary Josh Earnest says "on principle, that the success of our democracy depends on the rule of law, and there's no public official that is above the rule of law."