There will be a march past and gun salute for the Queen at Buckingham Palace The Duke of Cambridge will help the Queen celebrate her official birthday later by taking part in the Trooping the Colour parade for the first time.
The newly married Prince William will be on horseback for the annual event at Horse Guards, in central London.
The Duchess of Cambridge will go to the parade ground from Buckingham Palace in a horsedrawn carriage with Prince Harry and the Duchess of Cornwall.
The occasion comes a day after the Duke of Edinburgh marked his 90th birthday.
Prince William, dressed in the red uniform of the Irish Guards he wore on his wedding day, will participate in the parade as the regiment’s honorary colonel.
He will ride the Household Division charger Wellesley in the ceremony, which dates back to 1748.
Also riding will be the Colonel of the Welsh Guards, the Prince of Wales; Colonel of the Household Cavalry’s Blues and Royals, the Princess Royal; and Colonel of the Scots Guards, the Duke of Kent.
This year the colour, or flag, of the 1st Battalion the Scots Guards will be paraded.
After the Duchess of Cambridge’s first public engagement with her new title on Thursday – a lavish dinner with charitable giving and considerable wealth on display – this is more familiar royal territory, says BBC royal correspondent Peter Hunt.
He says the duchess will watch her husband embrace yet another aspect of his destiny – a ceremonial occasion which one day, as things stand, will be held in his honour.
The duchess will later appear on the Buckingham Palace balcony with members of her new family.
There will be a march past and gun salute for the Queen, who turned 85 on 21 April, at the palace.
Some 25 aircraft will take part in the traditional RAF flypast, including the World War II Spitfire, Hurricane and Lancaster, modern-day Typhoon fighters, and the Red Arrows aerobatics display team.
On the Duke of Edinburgh’s 90th birthday, the Queen conferred on him the title of Lord High Admiral of the Navy.
Prince Philip hosted an event for the Royal National Institute for Deaf People at Buckingham Palace during which guests gave the duke a spontaneous rendition of Happy Birthday.
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