Sophie finished the ensemble with a straw hat bearing an International Federation for Equestrian Sports (FEI) ribbon.

The Duke of Edinburgh looked dapper in a black blazer, a blue checked shirt, a pair of blue jeans and a Paralympics cap along with a pair of black sunglasses.

Royal fans were impressed with Sophie's "gorgeous" dress and took to Instagram to praise her for her style choice.

One user wrote on X: "That dress is absolutely gorgeous. I always think that Duke and Duchess of Edinburgh look like a couple that ‘compliments’ each other. They are so special."

Another one added: "Ooooh such a stunning dress! She looks divine as always."

A third one said: "Ah, I love this dress! I have a shirt that has the same material, same sleeves."

A fourth one agreed: "I love this dress it’s timeless & the hat is great, Sophie gets it right every time."

A fifth one chimed: "The Duchess looks absolutely gorgeous in this dress."

While a sixth one commented: "That dress is gorgeous!"