The event will take place in Lampton Park on Thursday April 21, the date of Her Majesty's actual birthday - two months before her official celebrations.
The public have been invited to attend the celebrations from 7pm-8pm, which will include recitals of the national anthem and Happy Birthday, as well as a parade with a brass band following the lighting.
The beacon will be lit behind the Civic Centre at the park in Lampton Road, Hounslow.
It is one of more than a thousand beacons due to be lit across the country that evening, after Prince Charles lights the "principal" beacon at Windsor Castle.
They will include special gas-fuelled beacons being taken to the top of the UK's four highest peaks by the Army Cadet Force.
Invited dignitaries and members of the public will be invited to sing the national anthem and Happy Birthday at the park in Lampton Road, Hounslow, before the beacon is lit.
The honour of lighting the beacon has been handed to Cadet Sergeant Major Khalil Ahmad, of Hounslow.
The 17-year-old, who is a member of the Heston Army Cadets, was recently appointed Lord Lieutenant’s Cadet , which is one of the most prestigious positions available to cadets.
The beacon lighting ceremony is due to begin with a private drinks reception in the Lampton Park Conference Centre.
Members of the public will be invited into viewing areas in the park at shortly before the opening speech and songs, which will be followed by the lighting of the beacon.
There will be free parking on a first-come first-served basis at the multi-storey car park at the Civic Centre for those attending the event.