Today, several cheeky young royals were observed peering out of a window overlooking Horse Guards Parade, though Harry and Meghan were nowhere to be seen.
Princes George and Louis were sighted on The Mall with their sister Charlotte, with Kate, Camilla, and Sophie Wessex also making an appearance on the balcony.
During the march, Louis was seen waving at Prince William and Prince Charles. While watching Trooping the Colour, Princess Beatrice appeared to point something out to the Cambridge youngsters.
At one point, Princess Charlotte appeared to be told off by mother Kate as the young royal played with Mia Tindall.
However, there was no sign of the Sussexes, or their children. Harry and Meghan are set to join senior royals at an official engagement for the first time in more than two years. They are expected to bring along three-year-old Archie and Lilibet, nearly one, for the public family reunion.
Lilibet has never been introduced to her royal relatives, while Archie has not been in the UK since he was six months old. But there is no invitation for shamed Prince Andrew even in a private capacity after his fall from grace.
The images of the peeking Cambridge children came after they bowed their heads when the national anthem was played on their arrival into Horse Guards Parade.
George was dressed in a navy suit, white shirt and blue tie for the occasion, while Louis was wearing a sailor-style white and navy top echoing an outfit worn by his father at the 1985 Trooping event.
Charlotte’s hair was down, dressed up with two fine plaits fastened with a blue ribbon, and she wore a cornflower dress. She peered out of the central window at Horse Guards Parade as Louis pointed out towards the ceremony.
They arrived at Horse Guards Parade alongside their mother and grandmother in a carriage. The Duchess of Cambridge was wearing a white coat dress by Alexander McQueen and a hat by Philip Treacy. Riding horses were the Prince of Wales on George, the Duke of Cambridge on Derby and the Princess Royal on Sir John.
The Prince of Wales went ahead of the Duke of Cambridge and the Princess Royal as they rode diagonally across the forecourt and under the arches of Horse Guards. Charles wore his scarlet Colonel of the Welsh Guards uniform and green thistle sash riding a horse named George. William rode on Derby in his Irish Guards uniform and Anne on a horse named Sir John in her Colonel of the Blues and Royals uniform as part of the colourful parade.
Royal superfans adorned themselves in Union flag clothing, flags and hats as they lined The Mall between Buckingham Palace and Trafalgar Square – where large crowds also gathered – to watch the Queen’s historic birthday parade kick off.
Groups were spotted cracking out glasses of Champagne and began singing God Save the Queen as early as 8am today – waking up the hardcore fans who had slept in chairs, tents and even on the pavement overnight to secure a prime spot for today’s celebrations.
Some had even flown in from as far and wide as Australia, Canada and the United States specially for the historic event, while others flocked from European countries including Germany and Italy to soak in the momentus occasion.
The sun was shining and spirits were high among the crowds as members of the public chatted and joked with police maintaining the perimeter. Several handmade signs hung over the barriers, with one simply saying, ‘thank you’.
Crowds were packed eight rows deep as they scrambled to watch the celebrations and were desperately trying to get a view of the royal action on their phones.
As the pomp and pageantry got underway, crowds cheered and clapped loudly as troops in bright red uniforms and bearskin hats made their way down The Mall towards Horse Guard Parade.
And an even bigger cheer erupted as the royals made their way down The Mall in carriages, led the Duchess of Cornwall, Camilla, and a beaming Duchess of Cambridge, Kate, accompanied by her three children, Prince George, Princess Charlotte and Prince Louis.
They were followed by Prince Edward, the Countess of Wessex and their children Lady Louise Windsor and James, Viscount Severn, 14, and then Princess Anne, the Princess Royal, and Prince Charles on horseback.