The New European is proud of its journalism and we hope you are proud of it too. If you value what we are doing, you can help us by making a contribution to the cost of our journalism
"It'll be the last big rallying cry for people to vote tactically to prevent a Johnson landslide," said Francis Grove-White, the deputy director of Open Britain and a long-time campaigner for People's Vote UK.
This Friday, December 6, thousands of people are planning to join in Westminster at the Methodist Central Hall, over the road from parliament.
Alastair Campbell, Michael Hesletine, and a number of very famous surprise guests yet to be announced will join together to deliver a rallying cry which "will be heard beyond Westminster, in every constituency across the country".
Grove-White, who is organising the event, was among the group behind the massive People's Vote marches in the nation's capital.
He said the event was "one more massive - and noisy - rally."
"Because this election campaign has boiled down to a simple choice: between a hard Brexit Boris Johnson landslide, or a hung parliament that will deliver the Final Say referendum our country needs," he added.
"The stakes could not be higher. So together, all of us can, must and will make our voices heard."
The event starts at 4.00pm on Friday, December 6, and is free but you need a ticket to sign up.