President Cristina Kircher will lead a delegation of more than 90 diplomats and officials to address the annual meeting of the UN decolonisation committee on the Falklands and 15 other territories. She will be the first head of state to address what is a relatively low-level UN Committee.
She is expected to argue that the islands, known as the Malvinas in Argentina, are still important to the people of Argentina, and that the UK should "stop ignoring" the work of the UN committee and sit down to proper negotiations on their future.
More top news
Britain should have a second vote on the terms of exiting the EU if it can secure a new deal to control its borders, Jeremy Hunt has said.
Complaints have been lodged with the chairman of the 1922 committee over the neutrality of government whips.
Disappointed England fans have taken to Twitter to react after their side lost to footballing minnows Iceland in Euro 2016.