Ukrainian President Volodymyr Zelenskiy will address Greece's parliament on April 7, parliament officials said on Monday.
Zelenskiy accepted an invitation to address the assembly virtually from its speaker, Constantinos Tasoulas, following a telephone call with Prime Minister Kyriakos Mitsotakis on Friday.
"It's important that Greek parliament listens to the message of a president, who along with his country, is defending himself against a barbaric and illegal invasion," Mitsotakis said after an EU Summit in Brussels.
Zelenskiy's address is scheduled to start at noon (0900 GMT).
Greece is coordinating with France and other countries to organise a humanitarian aid mission to Mariupol, a southern Ukrainian port city of 400,000 before the war where thousands of ethnic Greeks live, which has been one of the worst hit in the Russian invasion.
Russia says it is carrying out "a special military operation" in Ukraine.
Cardinals are scheduled to meet on Tuesday to plan Pope Francis' funeral, which leaders from around the world will attend ahead of a conclave next month to elect a new head of the Roman Catholic Church.
Russian President Vladimir Putin proposed on Monday bilateral talks with Ukraine for the first time since the early days of the war, and his Ukrainian counterpart Volodymyr Zelenskyy said Kyiv was eager to discuss a halt to attacks on civilian targets.
Ukraine issued air raid alerts for Kyiv and the country's eastern half as blasts shook the city of Mykolaiv early on Monday, authorities said, hours after the one-day Easter ceasefire declared by Russian President Vladimir Putin came to an end.
US Vice President JD Vance began a four-day visit to India on Monday and will hold talks with Prime Minister Narendra Modi, as New Delhi rushes to avoid steep US tariffs with an early trade deal and boost ties with the Trump administration.