Sanna Mirella Marin is a prominent Finnish politician who served as the Prime Minister of Finland from December 2019 to June 2023, making her the youngest person to hold the office at the age of 34 and the second woman to lead the country. A member of the Social Democratic Party (SDP), she became the party's leader in December 2020 and held the position until her resignation in 2023. Elected to the Finnish Parliament (Eduskunta) in 2015 representing the Tampere constituency, Marin previously served as Minister of Transport and Communications from 2019. Her rapid rise in politics was marked by her unexpected appointment as prime minister following the resignation of Antti Rinne amid a government crisis. Selected as a Young Global Leader by the World Economic Forum in 2017, Marin has been involved in international networks focused on global governance and progressive reforms.

During her premiership, Marin led Finland through significant challenges, including the COVID-19 pandemic, where her government's swift lockdowns and vaccination efforts were credited with effective virus control, though not without domestic criticism over restrictions. She played a pivotal role in Finland's historic decision to apply for and join NATO in April 2023, a shift from long-standing military non-alignment prompted by Russia's 2022 invasion of Ukraine. Marin's leadership style, often described as modern and empathetic, emphasized social welfare, climate action, gender equality, and work-life balance, resonating with younger voters. However, her tenure faced controversies, including a 2022 leaked video of her dancing at a private party, which sparked debates on leadership decorum, and criticism from conservative factions over her progressive stances on issues like LGBTQ+ rights.

Born into a working-class family in Helsinki, Marin entered politics early through the SDP youth organization, working as a parliamentary assistant and in municipal roles before her national breakthrough. After leaving office, she was re-elected to parliament in April 2023 but resigned in September 2023 to join the Tony Blair Institute for Global Change as a strategic adviser on political reform programs. Marin remains an influential voice in European social democracy, advocating for sustainable development and international cooperation.