New Zealand's prime minister Jacinda Ardern has been applauded for her actions following the Christchurch mosque shootings. Here's everything you need to know about her.

At 28 years old, Ardern was elected into New Zealand's Parliament as part of the center-left Labour Party.

At the time, she was parliament's youngest sitting member.

Nine years later in July 2017, Ardern was serving as deputy to the Labour Party's leader, Andrew Little, when he stepped down and named her as his successor.

Suddenly the party's polling numbers started to climb in what the country called "Jacindamania," according to NPR.

When Ardern assumed office in October 2017, she became New Zealand's youngest leader in 150 years.

Her platform focused on education reform, poverty, and mental healthcare, and she campaigned with "relentless positivity," NPR reported at the time.

Ardern, was a welcoming presence who occasionally spoke to reporters directly in the beginning stages of her leadership, instead of going through a spokesperson.

An Australian journalist from ABC Radio said shortly after Ardern was named the country's next prime minister, he called her office to determine how to pronounce her last name.

He said on Twitter — and Ardern later confirmed, according to the Associated Press — that it was Ardern who unexpectedly answered the phone.

"It was funny. I was in a meeting and my desk phone started to ring, and it doesn't ring much, so I went over and I saw it was an international number, and I just picked up," Ardern told The New Zealand Herald.

how's this. heard variant pronunciations of jacinda ardern, so called her office. got JA on the blower immediately. she confirmed: AH-durn

Ardern gave birth to her daughter, Neve Te Aroha Ardern Gayford, in June 2018. It is her first child with her longtime partner, TV host Clarke Gayford.

At the time, only one other world leader, former Prime Minister of Pakistan Benazir Bhutto, had given birth while in office.

Ardern celebrated her daughter’s birth on Instagram, thanking the "wonderful team at Auckland City Hospital" for its help.

After six weeks of maternity leave, Ardern returned to work, with Gayford staying home to care for their daughter.

When her daughter was three months old, Ardern brought her to the United Nations General Assembly in hopes of creating "a path for other women."

"I want to normalize it," she told CNN's Christiane Amanpour of the event. "If we want to make workplaces more open, we need to acknowledge logistical challenges ... by being more open it might create a path for other women."

Since the Christchurch mosque shootings last week, Ardern has called for a global campaign against racism.

The man who claimed responsibility for the shooting was an Australian national who had promoted white nationalism and anti-Muslim sentiments.

Ardern told BBC of the shooting: "What New Zealand experienced here was violence brought against us by someone who grew up and learned their ideology somewhere else. If we want to make sure globally that we are a safe and tolerant and inclusive world we cannot think about this in terms of boundaries."

• Read more:
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• New Zealand's Prime Minister promises never to say the Christchurch shooter's name
• People around the world are praising New Zealand Prime Minister Jacinda Ardern for her compassionate response to the Christchurch mosque shootings
• New Zealand quickly moves to reform gun laws after mosque massacre that killed 50, and promises detailed proposals within 10 days