The Mall in London will be turned into a huge street party next year to celebrate the Queen's patronage of more than 600 charities and organisations.
The royal sit-down celebration - also attended by the Duke of Edinburgh, Duke of Cambridge and Prince Harry - will include 10,000 guests, and will be the culmination of a weekend of national events to mark the monarch's official 90th birthday.
A service of thanksgiving will be attended by the Queen and Philip at St Paul's Cathedral on Friday, 10 June, with the traditional Trooping of the Colour - also known as the Queen's Birthday Parade - taking place the next day.
Guests at the street party will receive a hamper-style lunch along The Mall's length, along with entertainment and Union flags.
Among the organisations the Queen is a patron of are Barnado's, Battersea Dogs and Cats Home, Great Ormond Street and commonwealth organisations such as the Canadian Red Cross Society and the Australian Medical Association.
William and Harry will act as joint presidents of the event, and members of the public will be able to join at at live sites in Green Park and St James' Park.