The Supreme Court has ruled in a plurality 5-4 opinion that same sex marriage is a fundamental Constitutional right, and that the Fourteenth Amendment requires a State to license a marriage between two people of the same sex. This means all other marriage related rights such as divorce, child support, custody, and alimony now apply to unions between people of the same sex. This also means joint bankruptcies are now possible as well!
Justice Kennedy delivered the plurality opinion, in which Justices Ginsburg, Breyer, Sotomayor, and Kagan joined. Justices Roberts, Scalia, Thomas, and Alito each dissented – and each authored a dissent, which is extremely rare.
You can read the opinion here: