The charity was founded in 2006 by Prince Harry and Prince Seeiso to help children and young people affected by HIV in Lesotho and Botswana.
Meghan, who is turning 37 next week, cheered on her husband as he took part in the polo match. He and his wife, Delfina Blaquier attended Harry and Meghan's wedding back in May. The Sentebale Polo Game is a charity match to raise money for HIV-diagnosed children in Africa. It's one of the Royal Family's unofficial royal traditions, though it is certainly not expected for a royal couple to share a kiss! Nearly every year Diana and Charles were spotted together at a polo match, they were seen locking lips - some private kisses behind the scenes, others in the middle of the field while Harry's dad was accepting a trophy.
The polo match in Berkshire is an annual fundraiser for the charity, and Meghan was joined in the stands by former England rugby star Mike Tindall, who is married to Princess Anne's daughter Zara.
To finish the daytime aesthetic, Meghan once again opted for her signature wispy low bun, a pair of topaz-hued earrings by Canadian jewellers, Birks and carried a $78 J Crew Fan Rattan clutch bag in her grasp.
The official Kensington Royal photo of the Duke and Duchess has more than 250,000 likes.
What do you think about the public display of affection?