This from the AJC's Daniel Malloy in Washington:
Several hundred revelers waving signs and flags let out a yell in front of the Court as word spread of the decision, via smartphones, word of mouth and contagious cheering.
A brief rendition of the national anthem was followed by "USA" chants.
The first thing Paula Foster, of Nashville, did was call her wife: "Tennessee has to say we are married now," Foster said.
The pair had adopted two children since getting married in Canada in 2006.
"It's amazing to get to be here and see everything happen in the moment," she told the Atlanta Journal-Constitution as a tear rolled down her cheek.
"I was confident," she added. "Everything that has happened in the last few years has been leading to this moment."