The Prince of Wales is being supported on the polo field by his cousin, Peter Phillips, and Peter's new girlfriend, Harriet Sperling.
The loved-up couple are cheering on Prince William from the sidelines as he competes in the Out-Sourcing Inc Royal Charity Polo Cup 2024 at Guards Polo Club in Windsor Great Park.
The event will raise money for causes which William and the Princess of Wales are passionate about supporting, including the Motor Neurone Disease Association.
It comes after the Prince paid a personal tribute to "legend of rugby league" and MND campaigner Rob Burrow after his death from the disease last month.
It marks the 13th time William has played in the annual sporting fixture, which is set to generate £1 million this year to add to a running total of £13 million raised by the cup over the years.
"This year the event is set to take the total amount raised to more than £13,000,000 for well-deserving causes that the Prince and Princess are passionate about," Kensington Palace said ahead of the match.
Other causes to benefit are Wales Air Ambulance, Mountain Rescue England & Wales, SHOUT, Child Bereavement UK, Royal African Society, Place2Be, Action for Children, The Blackthorn Rally, HMS Oardacious Fund and The Royal Marsden.
The polo match comes just days before England are set to face Spain in the Euro 2024 final, with football fan William expected to attend in his role as President of the FA.
See all the best photos from the polo in the gallery below…
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© James WhatlingMingling with guests
The Prince of Wales, who donned a smart blazer, shirt and trousers, chatted with guests, spectators and supporters ahead of the match.
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© James WhatlingAll smiles
William inherited his love of polo from his father, King Charles, and his late great-grandfather, Prince Philip.
He and brother Harry have played the sport from a young age.
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© Max MumbyLoved-up display
William's cousin, Peter Phillips and his girlfriend, Harriet Sperling, held hands as they arrived at the match.
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© James WhatlingSummery look
Harriet looked elegant in a floral-print dress from royal fashion favourite, Beulah London, teaming her ensemble with pink and green espadrilles from Penelope Chilvers and a white Anya Hindmarch crossbody bag.
Ever the cool couple, Harriet and Peter sported FINLAY sunglasses for their outing.
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© James WhatlingLatest outing
The couple's appearance at the polo comes just days after they joined Queen Camilla in the Royal Box at Wimbledon.
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© GettyReady to play
William grinned with his teammates as he got ready to compete in the match.
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© GettyPlayer Four
William looked thrilled to be back in the saddle. The royal family has a long association with equestrian sports, with Prince Philip paving the way for carriage driving for the likes of Lady Louise Windsor.
The Princess Royal became the first royal to compete at the Olympics, participating in the 1976 Games in Montreal. Princess Anne's daughter Zara Tindall also won a silver medal for Team GB at the London 2012 Olympics.
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© Mark CuthbertAction Prince!
William showed off his skills on the polo field as you can see in this spectacular action shot.
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© Mark CuthbertPrincely smile
The sport is a firm favourite of the heir to the throne, and he could be seen beaming during a less hectic part of the game.
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© Chris JacksonWinning trophy
William played in a defensive role for the match, but his team ultimately emerged victorious at the match. The event raised £1 million for causes close to William's heart.
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© GettySummer of love
Peter's romance with Harriet was confirmed in May, following their appearance at the Badminton Horse Trials.
They also stepped out together at the Gloucestershire Festival of Polo at the Beaufort Club in Tetbury and Royal Ascot last month.
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© GettyAll about Peter and Harriet
Harriet is a writer, an NHS nurse and a mother to one daughter. She penned a story for Woman Alive magazine about her experience of raising her daughter alone.
Meanwhile, Peter, who is head of partner acquisition for the sports and entertainment rights agency CSM Sport & Entertainment, shares daughters, Savannah, 13, and Isla, 12, with ex-wife Autumn.
