The former transport minister takes the helm of a coalition of five parties that will all be led by women, once the prime minister takes over as head of her Social Democratic party next year. All but one of the female coalition leaders are aged under 35.
Marin became Finland’s third female prime minister after her nomination was passed in parliament by 99 votes to 70 Tuesday and President Sauli Niinisto officially appointed the new centre-left cabinet.
She succeeds Antti Rinne, who resigned last week after losing the trust of one of his coalition parties over his handling of a postal strike.
Marin has made global headlines for becoming not only Finland’s youngest ever leader, but also the world’s youngest sitting head of government, ahead of Ukraine’s Prime Minister Oleksiy Honcharuk who is currently 35.
But on Tuesday, Marin deflected questions about the international attention she has received over becoming the world’s youngest premier.
“My own thoughts have been on practical things and this week, I haven’t followed what the press have been writing very much either at home or abroad,” she told reporters outside parliament.
Earlier this week she said: “I have never thought about my age or gender, I think of the reasons I got into politics and those things for which we have won the trust of the electorate.”
Marin grew up looked after by her mother and her mother’s girlfriend, and said that her “rainbow family” showed her the importance of “equality, fairness and human rights”.
In a 2015 interview, Marin said she felt ‘invisible’ as a child, because she could not speak openly about her family setup.
She has also said that her childhood has strongly influenced her political priorities, which include protecting Finland’s generous welfare system and low levels of inequality.
“I come from a poor family and would not have been able to succeed and move forward were it not for the strong welfare state and the Finnish education system,” she told Helsingin Sanomat.
The Social Democrats took office in June after defeating the far-right, anti-immigration Finns Party by the narrowest of margins in April’s general election.
The victory was seen by some commentators as a triumph for Finland’s liberal, equal society over a party that ran on a ticket of cutting asylum levels almost to zero and halting anti-climate change measures.
Speaking after Tuesday’s parliamentary vote, Marin pledged to rebuild trust in her party.
“We have promised the Finnish people change and now we must deliver on that promise. In June we agreed a government programme together and I believe it is through actions that we will best restore people’s trust,” she said.