Zara Tindall was enthusiastically supported by her eleven-year-old daughter Mia Tindall at the Hartpury International Horse Trials, sharing in her mother's and grandmother's passion for equestrian sport.
The eldest child of Zara and Mike Tindall attended the Gloucestershire competition without her father, who was absent from the event.
Spectators observed Mia's animated reactions throughout the day, particularly when her mother successfully completed rounds in the multi-disciplinary competition.
The youngster was seen closely monitoring the technical aspects of the performances, including those of her mother's rivals, and comparing results.
Mia Tindall enthusiastically supported her mother as she competed at the Hartpury International Horse Trials
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Her excitement peaked during key moments, with witnesses noting her jubilant celebrations when Zara achieved clear rounds in both showjumping and cross-country events.
"Mia clearly loves the horses and loves watching her mum compete," a charmed onlooker said.
They continued: "She was thrilled when her mum completed a clear round in the showjumping, and she jumped up with joy when her mum cleared the cross country course with ease."
The source revealed that Mia meticulously monitored the competition standings, "checking the times of the other riders and comparing them against her mum's time in the showjumping".
Zara was taking part in several events at the Gloucestershire competition
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"She's clearly really invested in how well Zara was doing in the competition," the witness told Hello! Magazine.
The trials, which ran from 5 to 10 August, featured dressage, cross-country and showjumping disciplines at the venue located approximately 45 minutes from the Tindalls' Gatcombe Park residence.
Zara competed aboard her horse Showtime, dressed professionally in white jodhurs, a white shirt, blue jacket and black helmet during events.
Between competitions, she changed into casual attire comprising a light blue hooded sweatshirt, dark blue gilet and baseball cap.
Mia's grandmother and Zara's mother, Princess Anne, was a keen competitive equestrian in her youth
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Mia wore coordinating blue clothing, including a zip-up hoodie over a baby blue T-shirt paired with ripped denim shorts.
The family's equestrian heritage spans generations, with Zara's grandmother, Queen Elizabeth II, maintaining a renowned connection to horse racing throughout her life.
Princess Anne, Zara's mother, became the first British royal to compete at the Olympics, participating in the three-day eventing at Montreal 1976, where she rode the Queen's horse Goodwill.
Zara herself achieved significant success, winning gold at the 2005 European Eventing Championships and silver at the 2006 World Equestrian Games.
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Mia's father, Mike, was not present for Saturday's event
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She later secured a silver medal for Team GB at London 2012 alongside her horse High Kingdom, a moment Princess Eugenie described on social media as "one of her favourite memories".
Zara and Mike have recently returned from a summer break in Australia.
Writing about their experience down under, Mike shared on social media: "Made some incredible memories. What an unforgettable way to spend some downtime."