The Coronation will no doubt be one of the biggest days of King Charles' life - and certainly one he's been made to wait for.
But if last year's Platinum Jubilee celebrations for his late mother the Queen are anything to go by, he could see his young grandchildren steal the show.
The bumper bank holiday weekend was the first real taste of royal duty for Prince George, Princess Charlotte and Prince Louis - and they certainly made the most of, especially Louis.
He had a whale of the time at Trooping the Colour with some hilarious faces while watching the RAF flypast.
While at the Platinum Pageant, the four-year-old was captivated by the performers and had fun teasing his brother, sister and cousins.
The excitement appeared to reach fever pitch at one point for Louis when he was caught on camera waving his arms in the air wildly before making the peace sign.
Mum Kate cracked up laughing as did dad William - but for older brother George, he had a slightly different reaction, which one royal fan summed up as being "classic big bro".
After noticing Louis' outburst, George too laughed but as his little brother continued he appeared to cringe, before putting his head in his hands, as if he were mortified.
It didn't go unnoticed by royal watchers on Twitter, with one saying: "Prince George’s reaction is the best."
Another added: "George is like, 'not again Lou'" while another said: "Little kid living his best life. George: I'm dying. Make it stop."
Buckingham Palace has yet to confirm exactly which royals will be taking part in the Coronation ceremony but reports have suggested there will be major roles for the Prince and Princess and Wales and their children.
According to the Times, George, Charlotte and Louis will join with their grandfather the King and the Queen Consort for the procession out of the Abbey.
It is thought they will ride in a carriage with their parents behind the gold state coach carrying Charles and Camilla.
George, aged nine, and Charlotte who turns eight four days before the Coronation, both attended the Queen's state funeral last year - but Louis, who turns five in late April, was deemed to young.
Second-in-line to the throne George may also be given a role during the Coronation service as one day he will be King.
But sources say William and Kate have a strict condition that they don't want the role to "subject him to overwhelming scrutiny".
