Iceland’s prime minister has married her partner under a new law legalizing same-sex marriage in the country. One of her advisers, Hrannar B. Arnarsson, said Monday Prime Minister Johanna Sigurdardottir and writer Jonina Leosdottir were officially married Sunday, the day the law came into force. The pair has been in a registered partnership since 2002 and had applied to have it converted into a marriage under the new law. No ceremony was held.

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