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AUCKLAND, NEW ZEALAND - AUGUST 06:  Jacinda Ardern thanks her supporters ahead of announcing Labour's Auckland Transport Plan on August 6, 2017 in Auckland, New Zealand. Jacinda Ardern was elected unopposed as new Labour leader on Tuesday, 1 August following Andrew Little's resignation just seven weeks out from the general election. Kelvin Davis was elected as deputy leader.  (Photo by Hannah Peters/Getty Images)
AUCKLAND, NEW ZEALAND - AUGUST 06:  Jacinda Ardern thanks her supporters ahead of announcing Labour's Auckland Transport Plan on August 6, 2017 in Auckland, New Zealand. Jacinda Ardern was elected unopposed as new Labour leader on Tuesday, 1 August following Andrew Little's resignation just seven weeks out from the general election. Kelvin Davis was elected as deputy leader.  (Photo by Hannah Peters/Getty Images)

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    Meet New Zealand's new prime minister

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Meet New Zealand's new prime minister

37-year-old Jacinda Ardern will be New Zealand's new prime minister. Ardern will be the country's third female prime minister.

Meet New Zealand's new prime minister

37-year-old Jacinda Ardern will be New Zealand's new prime minister. Ardern will be the country's third female prime minister.