Her Majesty's actually reached the milestone in April but when you're that important you get two birthdays and she's gearing up to celebrate her official big day in June.
Fairground rides, free henna and face-painting, and live music will be among the attractions at a big bash on the green in Brabazon Road, Heston , on Sunday, June 12.
Families can also enjoy arts and crafts, football sessions for youngsters and magic from Captain Fantastic at the free party, which will run from midday to 4pm.
The event is being organised by Heston West Big Local, which was set up to spend a £1m Lottery windfall in the area , and anyone living in Heston West and nearby neighbourhoods is welcome to attend.
For more information about the party and other Lottery-funded activities taking place in the area, visit the Heston West Big Local website.
The celebrations in Heston are among a number of street parties planned across the borough to toast the Queen's 90th.
Scores of beacons were lit across the country, including several in west London , to mark Her Majesty's actual birthday in April.