New Zealand's prime minister has arrived at the hospital to have her first child.
New Zealand Prime Minister Jacinda Ardern (right) and her partner Clarke Gayford (left).
The baby arrived at 4.45pm, weighing 3.31kg.
Ms Ardern plans to take a six-week leave before returning to work.
Ms Ardern assured she would still be on call, and the government would be business as usual.
Partner Clarke Gayford will take on the primary baby care responsibility on Ms Ardern's return to office.
Traffic passes by Auckland City Hospital in New Zealand, where New Zealand Prime Minister Jacinda Ardern was admitted into early on Thursday for the birth of her first child, June 21, 2018.
The 37-year-old would become just the second elected world leader in modern times to give birth while in office, after the late Pakistan prime minister Benazir Bhutto gave birth to daughter Bakhtawar in 1990.
The couple announced the pregnancy to the public on 19 January.
Mr Peters - a colourful political veteran and head of the populist New Zealand First party - had already taken over some of Ms Ardern's duties in recent days, including running cabinet meetings in the capital of Wellington while she stayed close to home in Auckland.
Further afield, Queen Elizabeth gave birth to two of her four children after ascending to the throne, Prince Andrew and Prince Edward.