Ukraine's President Volodymyr Zelensky spoke to British politicians in the House of Commons now via live video link, APA reports citing BBC.
He tells MPs he is "addressing you as a citizen, as a president of a big country, with a dream".
He compares Ukraine's fight against Russia to the British war effort against Nazi Germany in World War Two.
"You didn't want to lose your country when Nazis wanted to take your country," he says. "And you had to fight for Britain."
He says his people have shown a "heroic" effort against Russian forces.
"Shelling didn't break us," he says.
Ukrainian President Volodymyr Zelensky says sanctions are welcome but it is not enough and says there needs to be a no-fly zone over Ukraine.
He says that the decision by the ICC to investigate Russia for war crimes gave them hope that there will be consequences. But Zelensky says it is not enough.
He says that more than 15 children have died in the war, and these are "lives of children that could have lived".
The Commons chamber was packed ahead of President Zelensky’s address.
It was the first time a foreign leader has spoken to MPs in the chamber of the Commons - normally these sorts of speeches happen in Westminster hall.
Much of the cabinet and shadow cabinet are here. The Ukrainian ambassador is sitting in the gallery.