Jacinda Ardern, the prime minister of New Zealand, brought her newborn baby to the United Nations General Assembly — becoming the first ever world leader to do so.

Ardern's partner, Clarke Gayford, traveled with her to New York to help care for the three-month-old.

Photos of the leader with her baby are making an impact online.

Ardern received praise from leaders like former US ambassador to the UN, Samantha Power.

New Zealand Prime Minister Jacinda Ardern made history on Monday evening when she became the first world leader to attend the United Nations General Assembly with her newborn baby.

Ardern, only the second elected world leader to give birth while in office, brought her infant baby Neve to the gathering, where she held the three-month-old before delivering a speech at the Nelson Mandela peace summit.

While Ardern was speaking, her partner Clarke Gayford, who traveled to New York on the family's dime to help care for Neve, held the baby on his lap. Gayford is a stay-at-home dad, and the couple has spoken candidly about their experience parenting while in office.

"What I consistently acknowledge is that I have assistants who help Clarke with the ability to juggle his career and be our primary caregiver," Ardern told CNN's Christiane Amanpour on Tuesday. What has struck me is the number of men and women who have said 'We do the same thing.' There's a lot of discussion ... And we need to normalize that, too."

See baby Neve at the UN:

Sinéad Baker contributed to this report.