Young people must vote in the referendum as it is their generation which will be most affected, Jeremy Corbyn said.
Launching a voter registration drive in Liverpool, the Labour leader told an audience of youngsters it was their futures which are most at stake.
"The people who will be most affected by the decision we make in next month's EU referendum will not be my generation, but your generation.
"It is young people who will make the difference in this referendum.
"This is your chance to make it clear that a vote to remain is about taking control of your future."
Corbyn insisted he was fully behind the Remain campaign, despite criticism that he was not showing enough enthusiasm.
"Labour is committed to a vote to remain in the EU and create a real social Europe for the future," he said.
Voters have until June 7 to register for the June 23 referendum.