Finland's President Sauli Niinisto confirmed on Sunday that his country would apply for membership of the NATO military alliance.
The announcement came after Niinisto and Prime Minister Sanna Marin said on Thursday they both favoured NATO membership, in a major policy shift prompted by Russia's invasion of Ukraine.
"Today, the President of the Republic and the Government's Foreign Policy Committee have jointly agreed that Finland will apply for NATO membership, after consulting parliament. This is a historic day. A new era is opening", President Sauli Niinisto said.
Niinisto added that he is ready to talk with Turkish President Recep Tayyip Erdoğan about the issues that he raised regarding the country's NATO membership.
As the next step, the Finnish parliament will convene on Monday to debate the decision, with current projections showing a large majority of the country's 200 member parliament supporting the bid.
"We have reached today an important decision in good cooperation with the government and the president of the republic. We hope the parliament will confirm the decision to apply for NATO membership during the coming days. It will be based on a strong mandate", Prime Minister Sanna Marin said.
Sharing a 1,300-kilometre (800-mile) border with Russia, Finland has remained militarily non-aligned for 75 years.
But after its powerful eastern neighbour invaded Ukraine in February, political and public opinion swung dramatically in favour of membership, with the Finnish president and prime minister on Thursday calling for the country to join NATO "without delay".
Russia has repeatedly warned of consequences if Helsinki joins the alliance.
Earlier this week, Niinisto told reporters that "joining NATO would not be against anyone."
He said his response to Russia would be: "You caused this. Look in the mirror."
