On Saturday, 7 Dec., Australia's first official same-sex weddings happened in the Australian Capital Territory.
Many Australians were overjoyed.
Today, the High Court of Australia ruled that the Marriage Equality Act that allowed these couples to get married is invalid.
They unanimously decided that marriage is a matter of federal law, and the state-based Marriage Equality Act can't operate alongside the federal Marriage Act, which currently defines marriage as between a man and woman. This means the dozens of same-sex marriages that have occurred in the past five days are now void.