THIS is the adorable moment Prince Louis chatted with his big sister Charlotte during their grandad's coronation.
, who only turned five two weeks ago, sat in the front row at Westminster Abbey with Charlotte, eight, and their parents.
Louis was seen pulling cheeky faces outside the church before the historic ceremony began.
Charlotte then took his hand to guide him through the church to their seats.
Once they sat Louis was seen asking his sister some very important questions as he was seen pointing to the Abbey's ceiling.
However, he then vanished from view as the long ceremony progressed.
It saw viewers take to social media commenting that young Louis had "disappeared", with many wondering where he had gone off to.
But after taking a short break he reappeared back with his family.
Louis could also appear on Buckingham Palace balcony with his parents and siblings.
Louis, who stole the show with his cheeky antics at the Platinum Jubilee a year ago, was also seem in a carriage waving to crowds on the 1.3-mile Coronation Procession from Westminster Abbey back to Buckingham Palace.
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He once again traveled with the Prince and Princess of Wales, Prince George and Princess Charlotte in the carriage behind the Gold State Coach of the King and Queen.
Yesterday Kate was asked whether she thought her youngest would behave today.
She told fans: "I hope so! You never quite know with him!"
Prince George, nine, traveled with other Pages of Honour from Buckingham Palace.
The nine-year-old is the youngest ever future king to have a ceremonial role at a coronation, as he appears as one of the King’s Pages of Honour.
All three children have been practicing this week, including a full rehearsal at Westminster Abbey on Wednesday.
Charlotte and the Princess of Wales are today dressed in matching outfits complete with silver crowns.
The pair are wearing Alexander McQueen dresses in ivory silk crepe with silver bullion and thread work embroidery featuring rose, thistle, daffodil and shamrock motifs.