They stole the show at their grandfather King Charles' Coronation as they watched him crowned in Westminster Abbey and waved sweetly to the crowds.
But as the monarch celebrates his Coronation with a special service in Edinburgh today, Prince George, Princess Charlotte and Prince Louis were nowhere to be seen.
Their parents the Prince and Princess of Wales - also known as the Duke and Duchess of Rothesay in Scotland - have been on hand to support the King and Queen Camilla at the service of thanksgiving and dedication at St Giles’ Cathedral.
During the ceremony, Charles was presented with the Honours of Scotland - the Scottish Crown Jewels, which includes the Scottish Crown.
Royal fans had wondered if the youngsters aged 10, eight and five, would be present for the ceremony but were left disappointed not to see them.
However, the reason for their absence can easily be explained - they all had to attend school.
The trio all attend Lambrook School close to their home in Windsor and are in the final days of their summer term, with school set to break up for the holidays at the end of the week.
But with William and Kate keen to give their children a normal as possible upbringing, it's no surprise they decided against taking them out of school for today's ceremony.
At the Coronation in May, all three children attended, with oldest child George acting as a page of honour and helping to carrying King Charles' robes.
Meanwhile, Charlotte and Louis sat with their parents for the ceremony with Charlotte in an outfit mirroring her mother Kate and Louis wearing a blue tunic coat.
At one point, there was confusion when Louis appeared to going missing from the ceremony and wasn't seen sitting next to his parents and his siblings.
However, the reason why he was not seen watching the service was revealed - and it is all to do with his tender age.
At five years old, he did process into the Abbey with his family - but due to still being young, he was "retired" during the service, which was planned for the young prince. He later joined them again for the National Anthem and the procession out of the Abbey.
The last time the trio were seen at a royal event was last month when they took part in Trooping the Colour - King Charles' first official birthday parade.
There, they all rode in a carriage in the processions from Buckingham Palace to Horse Guards Parade and also appeared on the palace balcony for a roaring RAF flypast, which included the Red Arrows.
