Ukrainian President Volodymyr Zelenskyy will address British MPs via video link tomorrow.
Commons Speaker Sir Lindsay Hoyle has granted Mr Zelenskyy’s request to read a statement to the House of Commons at 5pm GMT on Tuesday.
It is expected he will ask for more arms and will repeat calls for a no-fly zone over Ukraine, which Western leaders have so far denied as it could mean NATO having to shoot down Russian planes.
They fear it would risk a third world war.
“Every parliamentarian wants to hear directly from the president, who will be speaking to us live from Ukraine, so this is an important opportunity for the House,” the Speaker said.
“Thanks again to our incredible staff for working at pace to make this historic address possible.”