The Russian president will later give an update on what he calls his “special military operation” in Ukraine.
Vladimir Putin will address members of both houses of parliament, military commanders and soldiers – nearly a year after sending troops to the country.
Despite their numerical superiority, Russian troops have been defeated several times since the start of the war, although they still control around a fifth of Ukraine.
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Mr Putin’s speech has not been published, but he is also expected to share his thoughts on the world and Russia’s economic progress since Western countries responded to the invasion with tough sanctions.
Kremlin spokesman Dmitry Peskov told Russian news agency TASS: “Our whole life revolves around the special operation number.
“And the special military operation influences our life in one way or another, influences life on the mainland.
“Therefore, of course, it would be reasonable to expect the president to pay a lot of attention to the operation.
“Everyone is waiting for the address, hoping to hear the business report, the special military operation report, the international situation report and the president’s vision on how we are handling it and how we will develop in the future. ‘coming.”
According to TASS, federal TV stations allocated an hour for the presidential speech, but the length of the speech belongs to Mr Putin.
In April 2021, the speech lasted one hour and 19 minutes while in 2018 it lasted one hour and 55 minutes, and in 2004 and 2005 it lasted only 48 minutes.
The address is aimed at domestic audiences, with around 1,000 guests expected, and journalists are only invited from Russia and “friendly countries”, the news agency added.
Tens of thousands of men have been killed fighting in Ukraine – and Putin, 70, now says the country is locked in an existential battle with an arrogant West that wants to carve up Russia and steal its vast natural resources.
Imprisoned Russian opposition politician Alexei Navalny has accused Putin of destroying Russia’s future in the name of his own personal ambitions.
“The real reasons for this war are political and economic problems in Russia, Putin’s desire to retain power at all costs and his obsession with his own historical legacy,” Navalny said.
Mr Putin’s speech is due to start at 9am UK time.