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.
The US Central Command said it will begin implementing a blockade of all maritime traffic entering and exiting Iranian ports on April 13 at 10 a.m. ET (1400 GMT), after President Donald Trump said the US Navy would start blockading the Strait of Hormuz.
Hungary's veteran nationalist leader Viktor Orban lost power to the upstart centre-right Tisza party in Sunday's national election after 16 years in office, marking a setback for his allies in Russia and US President Donald Trump's White House.
President Donald Trump said on Sunday the US Navy would immediately start blockading the Strait of Hormuz, raising the stakes after marathon talks with Iran failed to reach a deal to end the war, jeopardising a fragile two-week ceasefire.
At least 200 people are feared dead after Nigerian military jets struck a village market while pursuing rebels in the northeast of the country on Saturday night, a councillor for the area and residents said on Sunday.
Russia and Ukraine accused each other on Sunday of breaching the 32-hour ceasefire in their four-year war, reporting more than a thousand drone and shelling attacks just hours after the truce began on Saturday to mark Orthodox Easter.