The new Prime Minister will hold her first caucus meeting this afternoon, when ministerial roles will be discussed. Labour has agreed to give New Zealand First four Cabinet positions and an undersecretary, while the Greens will be given three ministers outside Cabinet and an undersecretary.
At just the age of 37, Ms Ardern is the country's youngest prime minister in 160 years, New Zealand's third female prime minister and joins the growing ranks of young leaders around the world.
Even her opponent Bill English yesterday called her rise to the prime ministership "remarkable", after she took over the Labour leadership just seven weeks out from Election Day, leading the ailing party to an immediate surge in the polls.
She told Morning Report the coalition would "absolutely" last the distance.