King Charles and Duchess Sophie were pictured in high spirits at the Royal Windsor Horse Show in Berkshire.Members of the Royal Family attended the second day of the prestigious equestrian event on Friday, which is set to run until this Sunday.The King donned a grey suit and green tie as he grinned in the Castle arena, with some images capturing him throwing his hands in the air as he celebrated the victory of his winning horse.The Duchess of Edinburgh was photographed sheltering from the cool temperatures inside a buggy, having worn three layers of outerwear to combat the chilly weather. Despite the less-than-ideal conditions, Sophie maintained her characteristic good spirits and was seen smiling throughout her visit to the races.The Duchess was also seen laughing alongside her daughter in a rare appearance from the young royal. Present, but working away behind the scenes at her part-time job, was Lady Louise Windsor, 22 - King Charles' niece.She appeared beaming in photographs as she strolled through the showground after wrapping up her English degree at the University of St Andrews.King Charles III (left) and the Duchess of Edinburgh (right) watch a display in the Castle arena during the Royal Windsor Horse Show The King donned a grey suit and green tie as he grinned in the Castle arena King Charles showed off a range of expressions while watching the equestrian action Despite the less-than-ideal conditions, Sophie maintained her characteristic good spirits and was seen looking engaged throughout her visit to the racesWearing practical tall brown boots and a long checkered skirt, the young royal looked very professional with her official blue badge bearing her full name, Lady Louise Mountbatten-Windsor.Louise is not a working royal, so the four-day event is a rare opportunity for her to be seen in public after she has been absent from recent royal family events, including the Easter service. She is understood to be competing in the show later in the week. Princess Anne was also present at the race, where she was seen in conversation with jockey Katie Jerram Hunnable following her triumph aboard First Receiver in the RoR Tattersalls Thoroughbred Ridden Show series qualifier for flat horses. Prince Edward was seen at the Royal Windsor Horse Show, where he was spotted viewing an impressive piece of royal motoring history.The Duke of Edinburgh was photographed examining a 1966 Land Rover Series IIa, a vehicle that holds particular significance as it was once used by the late Queen Elizabeth II.The classic Land Rover, now over six decades old, serves as a reminder of the late monarch's well-documented fondness for the British-made vehicles, which she famously drove around her country estates throughout her reign.The Royal Windsor Horse Show is a popular event among royals, and it was said to be the late Queen Elizabeth II's favourite event on the royal calendar. The royal was snapped covering his ears while attending the show King Charles III (left) and the Duchess of Edinburgh (right) react as members of the King's Troop, Royal Horse Artillery fire their guns in the Castle arena King Charles was pictured shieling his eyes during his appearance at the equestrian event The King made a range of facial expressions during the prestigious equestrian event King Charles III (right) and the Duke of Edinburgh (left) watch a display in the Castle arena during the Royal Windsor Horse Show King Charles III (left) and the Duchess of Edinburgh (right)Her connection to the show dated back to its inception: The first Royal Windsor Horse Show took place in May 1943 under the name the Windsor Horse and Dog Show. The Royal Windsor Horse Show is the only time of year the private grounds of Windsor Castle are open to the public. The event's official website states: 'A week of top-level international equestrian competition across the FEI disciplines of Show Jumping, Driving, and Endurance reaches its pinnacle on the Sunday with the Rolex Grand Prix. 'Elsewhere, the Show delights visitors with four arenas of prestigious Showing classes, thrilling international equestrian and military displays and a huge country lifestyle shopping village, making for the perfect family day out this Spring.'It comes after Queen Camilla, who was not seen at the equestrian event on Thursday, delighted royal fans with a hilariously subtle attempt to get King Charles to hurry along during the State Opening of Parliament on Wednesday.Video footage captured Her Majesty, 78, lightly tapping her husband's arm to signal that he needed to end his conversation with one of the attendees as the royal couple prepared to leave the Palace of Westminster.Camilla was then seen striding well ahead of Charles, who seemed preoccupied with placing his State Admiral of the Fleet Royal Navy cap on his head as their Majesties departed from the Sovereign Entrance.The comical moment shared between Their Majesties delighted royal fans on X, who quipped that Camilla was 'telling the King to get a move on!' King Charles III stands as members of the King's Troop, Royal Horse Artillery take part in a Royal salute in the Castle arena The King waved and smiled at crowds as they cheered when he arrived King Charles III Attends Royal Windsor Horse Show, Windsor, Berkshire King Charles III watches a display in the Castle arena during the Royal Windsor Horse Show in WindsorCharles and Camilla attended the State Opening of Parliament to set out the priorities for Sir Keir Starmer's government in the King's Speech. During his speech, the monarch said the Government will take 'urgent action to tackle antisemitism and ensure all communities feel safe' and 'defend the British values of decency, tolerance and respect for difference under our common flag'.The King’s Speech ran to 1,285 words, making it one of the longest monarch’s speeches at a State Opening of Parliament this century. It was also one of the most legislation-heavy speeches of recent years, containing a total of 37 Bills.