"Very excited city. Congratulations, America," the star, who is currently in New York in anticipation for the Pride parade this weekend, said.
He added that he hopes America's decision will influence countries around the world who have yet to accept same-sex marriage as a right, reported E!Online.
"It's a great relief. Strange that it all rest on the decision of one of the judges, but he fortunately landed on the right side so everyone can heave a sigh of relief.
"And America now joins in all the other countries who've been doing the same thing. I think this is gonna be a rapid domino effect. So it'll have a big effect beyond these shores, I hope.