As you may know already, the event has no less than 1400 parading soldiers, 200 horses as well as 400 musicians, all coming together to pay tribute to Her Majesty Queen Elizabeth II on her birthday.
Prince Philip, the Duke of Edinburgh, did not take part today, in line with his retirement from public life a year ago.
Harry and Meghan passed another royal milestone as husband and wife when they joined her in acknowledging the crowds gathered in the Mall following the traditional ceremony to mark her official birthday.
The Duke and Duchess of Sussex who just returned from their Honeymoon were spotted at the ceremony as Meghan opted for a pale pink off-the-shoulder dress by Carolina Herrera with a matching hat by Philip Treacy.
Her husband, the Duke of Edinburgh, attended the event with her previous year, but was absent today.
Lall was one of around 1,000 servicemen and women who took part in the event to mark the Queen's official birthday. REUTERS/Peter Nicholls Britain's Prince Harry and Meghan, Duchess of Sussex, take part in the Trooping the Colour parade in central London, Britain, June 9, 2018.
So far, it seems Meghan has impressed Queen Elizabeth.More news: Warriors complete sweep of Cavaliers to claim National Basketball Association title
The Queen's actual birthday is April 21.
Prince Harry is relegated to a spot in a carriage because he is not a royal colonel.
Meghan, the new Duchess of Sussex, who has been welcomed into the Royal Family with open arms, has a busy week of appearances ahead. And while there are other family members who are royal colonels in the Queen's guard, in this parade, only Princes Charles and William are Colonels of the Household Division.
The Queen soon made her entrance onto Horse Guards in an Ascot Landau after making her journey from her famous London home Buckingham Palace. Such was the case during Meghan and Harry's return to Buckingham Palace, when she could be seen trying to keep her hair in some semblance of order.
Click through the gallery to see the most stylish looks donned by the royals at 2018's Trooping the Colour.