The event, organised by the British Pakistani Christian Association will be held outside Downing Street, on Whitehall, at 12pm.
Guest speakers from diverse religious and political groups will pay tribute to the police officer who was stabbed in the attack outside the Houses of Parliament and condemn acts of terror.
London-based Ooberfuse, a band who tackle complex socio-economic issues in their music will be performing, along with acro-dancer Latasha Sinclair.
The group will proceed from Whitehall to the National Police Memorial at Pall Mall, led by a bagpiper, where they will lay a wreath and pay tribute to PC Palmer.
Wilson Chowdhry, Chairman of the British Pakistani Christian Association, said: "This is event is an opportunity for ordinary people to pay tribute to the heroism of PC Keith Palmer.
"His sacrifice reminds us of the bravery of our National Police Service.
"We have mourned as a nation, now we should celebrate a life that has come to define all that it means to be a good citizen.
"Extremism threatens our society and it is only by working together and condemning hatred where we can, that we can make this world a better place for all to live."
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