Ms Ardern with partner Mr Gayford after announcing her resignation at War Memorial Hall in Napier. EPA
Jacinda Ardern at New Zealand's parliament in 2017 after becoming leader of the Labour party. Getty
Ms Ardern attends a group photo with other leaders at the 2017 Asia-Pacific Economic Co-operation summit in Vietnam. AFP
Former German chancellor Angela Merkel, right, with Ms Ardern in Berlin. Getty
Ms Ardern and partner Clarke Gayford with their newborn daughter on June 21, 2018, in Auckland. Getty
Ms Ardern holds her daughter at the Nelson Mandela Peace Summit in 2018. AFP
Ms Ardern addresses the media in 2019, after a right-wing extremist who killed 49 worshippers at two mosques in Christchurch appeared in court. AFP
She meets members of the Muslim community after the mass shooting at the mosques. EPA
Burj Khalifa in Dubai is lit up with an image of Ms Ardern, in appreciation of her support for New Zealand's Muslim community. AFP
She meets Chinese President Xi Jinping in 2019, in Beijing. Getty
Ms Ardern gives the UK's Prince William a traditional Maori 'hongi' welcome at the War Memorial Museum in Auckland. AFP
Ms Ardern speaks during the 74th session of the UN General Assembly at the UN headquarters, in New York. AFP
With Finance Minister Grant Robertson, cooking breakfast for the crowds during the Waitangi Day national holiday, on February 6, 2021. Getty Images
Ms Ardern and Australian Prime Minister Scott Morrison swap football jerseys on May 31, 2021, in Queenstown. Mr Morrison was on a two-day visit to New Zealand, his first overseas visit that year. Getty
Receiving a dose of the Pfizer Covid vaccine from nurse Gordana Nezich, on July 28, 2021, in Hamilton. Getty
US President Joe Biden receiveds Ms Ardern in the Oval Office at the White House, on May 31, 2022. The two leaders discussed security and engagement in the Asia Pacific region. AFP
Ms Ardern with her British counterpart Boris Johnson, as she arrives for a meeting at Downing Street on July 1, 2022, in London. Getty
Britain's King Charles III speaks with Ms Ardern, as he receives realm prime ministers in the 1844 Room at Buckingham Palace, on September 17, 2022. PA
Ms Ardern arrives at the funeral of Queen Elizabeth II, held at Westminster Abbey, London, on September 19, 2022. PA
Announcing her resignation in Wellington, on January 19. AFP
Ms Ardern with partner Mr Gayford after announcing her resignation at War Memorial Hall in Napier. EPA
Jacinda Ardern at New Zealand's parliament in 2017 after becoming leader of the Labour party. Getty
Ms Ardern attends a group photo with other leaders at the 2017 Asia-Pacific Economic Co-operation summit in Vietnam. AFP
Former German chancellor Angela Merkel, right, with Ms Ardern in Berlin. Getty
Ms Ardern and partner Clarke Gayford with their newborn daughter on June 21, 2018, in Auckland. Getty
Ms Ardern holds her daughter at the Nelson Mandela Peace Summit in 2018. AFP
Ms Ardern addresses the media in 2019, after a right-wing extremist who killed 49 worshippers at two mosques in Christchurch appeared in court. AFP
She meets members of the Muslim community after the mass shooting at the mosques. EPA
Burj Khalifa in Dubai is lit up with an image of Ms Ardern, in appreciation of her support for New Zealand's Muslim community. AFP
She meets Chinese President Xi Jinping in 2019, in Beijing. Getty
Ms Ardern gives the UK's Prince William a traditional Maori 'hongi' welcome at the War Memorial Museum in Auckland. AFP
Ms Ardern speaks during the 74th session of the UN General Assembly at the UN headquarters, in New York. AFP
With Finance Minister Grant Robertson, cooking breakfast for the crowds during the Waitangi Day national holiday, on February 6, 2021. Getty Images
Ms Ardern and Australian Prime Minister Scott Morrison swap football jerseys on May 31, 2021, in Queenstown. Mr Morrison was on a two-day visit to New Zealand, his first overseas visit that year. Getty
Receiving a dose of the Pfizer Covid vaccine from nurse Gordana Nezich, on July 28, 2021, in Hamilton. Getty
US President Joe Biden receiveds Ms Ardern in the Oval Office at the White House, on May 31, 2022. The two leaders discussed security and engagement in the Asia Pacific region. AFP
Ms Ardern with her British counterpart Boris Johnson, as she arrives for a meeting at Downing Street on July 1, 2022, in London. Getty
Britain's King Charles III speaks with Ms Ardern, as he receives realm prime ministers in the 1844 Room at Buckingham Palace, on September 17, 2022. PA
Ms Ardern arrives at the funeral of Queen Elizabeth II, held at Westminster Abbey, London, on September 19, 2022. PA
Announcing her resignation in Wellington, on January 19. AFP
Ms Ardern with partner Mr Gayford after announcing her resignation at War Memorial Hall in Napier. EPA