Justice Ruth Bader Ginsburg presided at a same-sex wedding Saturday evening at the Kennedy Center for the Performing Arts.
The wedding was between Kennedy Center President Michael Kaiser, who is a longtime friend of hers, and John Roberts, a government economist.
Kaiser told The Associated Press he asked Ginsburg to officiate.
"It's very meaningful mostly to have a friend officiate, and then for someone of her stature, it's a very big honor," Kaiser said. "I think that everything that's going on that makes same-sex marriage possible and visible helps to encourage others and to make the issue seem less of an issue, to make it just more part of life."
Ginsburg released a statement Friday calling Kaiser "a friend and someone I much admire."
"That is why I am officiating at his wedding," she said.
When the court heard arguments over whether same-sex couples should receive the same federal rights as heterosexual married couples, Ginsburg argued that all married couples should be treated equally.