A family affair! Zara Tindall joins her stylish sister-in-law Harriet and brother Peter as well as their father Captain Mark Phillips, 77, and his Belgian equestrian girlfriend Florence Standaert, 44, at Burghley Horse Trials

It was a royal family affair at the Burghley Horse Trials as Zara Tindall, Peter Phillips and his wife Harriet Sperling were all out together today. Peter, 48, and Harriet, 45, were the picture of newlywed bliss as they exchanged smiles and held hands on day two of the annual event in Lincolnshire. For the occasion, Princess Anne's son donned a pair of navy trousers, a shirt and a gilet for a relaxed, sporty look. Meanwhile, NHS nurse Harriet, who married Peter this summer, looked stylish in white, wide-leg trousers, a cropped black denim jacket, and a colourful printed blouse. She finished her look with a pair of green suede ballet flats, a bright blue straw tote as well as a mini white clutch bag. They were joined by Peter's sister Zara, an accomplished equestrian who takes part in the trials every year, their father, Captain Mark Phillips, 77, and his girlfriend, Florence Standaert, 44. Princess Anne's ex-husband has been rumoured to be dating the Belgian equestrian since 2022, with Florence also accompanying Captain Mark to Peter and Harriet's 'intimate' Cotswolds wedding in June. Harriet and Peter have spent their summer at an array of high society events - including Royal Ascot, Wimbledon and the Badminton Horse Trials - after tying the knot at All Saints Church in Kemble, Gloucestershire. Peter, 48, and Harriet, 45, were the picture of newlywed bliss as they exchanged smiles and held hands on day one of the event in Lincolnshire Princess Anne's daughter Zara cut a casual figure in a pair of slim-fitting jeans, a windbreaker, sneakers and a navy baseball cap Captain Mark Phillips, 77, pictured at the event with his girlfriend, Belgian equestrian Florence StandaertThey arrived at the Burghley Horse Trials to cheer for Zara, who cut a casual figure in a pair of slim-fit denim jeans, a windbreaker jacket, a navy baseball cap, and white sneakers. Her natural beauty shone through as the Olympic silver medallist sat down for an interview at the Burghley Horse Trials. It comes after Zara claimed her first major championship title in nearly 20 years after riding to victory at the Hartpury International Horse Trials and British Championships last month. Zara, 45, rode 17-year-old Class Affair to victory and took home a £5,000 prize.An onlooker told HELLO! that Zara was having a 'whale of a time' as she competed, even shouting 'Whee' as she cleared the jumps.They said: 'Zara was in a crazy mood, she seemed super happy, smiling as she jumped over the jumps, even going "Whee", she was smiling and beaming, kissing the horse.'Speaking about her achievement, the onlooker added: 'She's taken this horse, who is on the downward trend, and taken him to glory in the British Open championships.'The victory marked Zara's first major championship title since she helped Britain claim team gold at the European Eventing Championships in 2007.But despite her triumph, the royal was forced to celebrate without her family, with no relatives spotted cheering her on from the sidelines.However, several members of her family were out to support Zara today in a royal reunion after Harriet and Peter's Cotswolds wedding. Peter and Harriet, who looked resplendent in a white Emilia Wickstead gown and the Pragnell family tiara, were the picture of wedded bliss as they sealed their marriage with a kiss outside All Saints Church.Harriet's wedding train was held by her three bridesmaids, her daughter Georgina, 14, and Peter's children, Isla, 14, and Savannah, 15, with former wife Autumn Kelly, who all looked elegant in floral garlands and matching white dresses from the same designer.The couple's guests included the Prince and Princess of Wales and the Duke and Duchess of Edinburgh, as well as Princesses Beatrice and Eugenie, with their respective husbands Edoardo Mapelli Mozzi and Jack Brooksbank.