New Zealand Prime Minister Jacinda Ardern made her inaugural speech at a U.N. General Assembly event in New York on Monday. However it was her 3-month-old daughter, Neve, who stole the show.

Provided with a mock security pass that lists her as the "First Baby" of New Zealand, Neve was seen sitting on her mother's lap in the main assembly hall, next to father Clarke Gayford, who is the baby's full-time caregiver.

(Jacinda Ardern holds her daughter in June 2018, alongside partner Clarke Cayford)
[Getty/Kyodo]

Gayford tweeted earlier Monday that because there had been so much interest in the infant's diplomatic pass, the staff at the United Nations "whipped one up."

"I wish I could have captured the startled look on a Japanese delegation inside the U.N. yesterday who walked into a meeting room in the middle of a nappy change," the television show host added, saying it would make an amusing anecdote for Neve's 21st birthday.

Ardern, 38, has previously explained that she is committed to breastfeeding Neve, and as such the infant will accompany her on all business trips.

In her speech at the Nelson Mandela Peace Summit, Ardern spoke about the "profound impact" the late South African President Nelson Mandela had had on New Zealand.

On Thursday, the premier is scheduled to deliver a speech at the General Assembly during the general debate.

Ardern, who was elected prime minister in October 2017, is understood to be the first female world leader to bring an infant to a U.N. general assembly meeting, and is only the second world leader to give birth while in office.