Prince Louis showcased his gap-toothed grin as he joined his family for the annual Trooping the Colour today.The Prince and Princess of Wales's son, who recently turned eight, was accompanied by his siblings, Prince George, 12, and Princess Charlotte, 11, for their grandfather, King Charles's official birthday parade in London.Louis, dressed in a smart suit, was seen beaming as he travelled towards Buckingham Palace in the Ascot Landau carriage while sat next to his mother.While it's usually Charlotte who matches her outfit with Kate, today Louis and George wore ties the colour of their mother Catherine's light blue and white ensemble.Earlier this year, while he is known and beloved for his cheeky antics at royal events, the famously playful Louis surprised fans by being on his best behaviour during the Royal Family's traditional Easter Service at St George's Chapel in Windsor.X users said they were in awe of how 'grown up' little Louis was as he waved bashfully for photos with his sister.'The HRH's of Wales are raising their children to be respectful and well mannered to all that they meet,' one supporter wrote on social media. 'Young HRH Prince Louis is learning very well.''Such well behaved children,' another gushed. Prince Louis, eight, showcased his gap-toothed grin at Trooping the Colour in central London todayEaster certainly marked a change from previous years, which saw Louis winning himself legions of fans through his cheeky antics.The King's Birthday Parade this year comes exactly one week after the royals gathered in Kemble, Gloucestershire, for Peter Phillips and Harriet Sperling's 'intimate' wedding.Catherine looked the picture of poise as she arrived at All Saints Church in a Roland Mouret £750 dress and Jane Taylor hat, alongside her husband William, 43.The future Queen was met with the sounds of cheers from crowds of well-wishers who had gathered to catch a glimpse of the royal guests.Trooping the Colour is a military ceremony that dates back to the 18th century and is one of the most high-profile royal events of the year.It is rooted in battlefield custom, when regimental flags, or 'colours,' were trooped in front of soldiers to ensure they could be recognised amid the smoke of combat.This year, the honour of trooping the Colour falls to the Grenadier Guards, the British Army's most senior infantry regiment, which is celebrating its 370th anniversary.It marks the fourth Trooping the Colour of His Majesty's reign, after the death of Queen Elizabeth on September 8, 2022. The eight-year-old sat next to his mother, the Princess of Wales, for the Trooping the Colour parade Kate was all smiles during the parade, alongside a more serious-looking Louis The future Queen with her three children, Prince Louis (next to Kate), and Prince George and Princess Charlotte sat opposite Kate and Louis smiling at members of the public, who waited eagerly for a glimpse of the royals Charles attended his first Trooping the Colour in 1951, aged three, riding in a carriage with his grandmother, Queen Elizabeth, The Queen Mother, and his aunt, Princess Margaret.The King first rode in the parade as Colonel of the Welsh Guards in 1975.The Colours being trooped today were presented to The Regiment by The King in the Gardens of Buckingham Palace on Tuesday, 9 June.Trooping the Colour was once the largest public gathering of royals of the year, with more than 40 members of the Firm jostling for position on the Buckingham Palace balcony during the flypast.Now, the sparse group is made up of working royals only, including the Prince and Princess of Wales, the Princess Royal and her husband, Vice Admiral Sir Timothy Laurence, and the Duke and Duchess of Edinburgh. They will be joined by the Duke and Duchess of Gloucester and the Duke of Kent, now the oldest working royal at the age of 90, while the King's estranged son, Montecito-based Prince Harry and his wife, Meghan Markle, will be notably absent. The daughters of disgraced former prince Andrew, Princesses Beatrice and Eugenie will not attend today's Trooping the Colour, which they last attended in 2022.They were last seen on the palace balcony with the late Queen Elizabeth in 2019, after they arrived at the Horse Guards Parade riding in an open-top carriage accompanied by Eugenie's husband, Jack Brooksbank, and Prince Edward. In the wake of the scandal surrounding Andrew and his ex-wife Sarah Ferguson's friendship with billionaire paedophile Jeffrey Epstein, Beatrice and Eugenie - who is expecting her third child with Jack - have largely kept out of the spotlight. While they were welcomed back into the royal fold for Peter and Harriet's wedding, Beatrice and Eugenie - who are not working members of The Firm - will not attend today's festivities.