Princess Eugenie, 32, was stunning in a £1,495 Roksanda silk Ariana midi dress in merlot. The royal looked absolutely beautiful. Princess Beatrice, 33, was equally gorgeous in her £375 Saloni Devon ruffle-trimmed fil coupe chiffon midi dress.
The black leather shoes cost just £43.08 as they are on sale from £65.45.
Eugenie, meanwhile, wore black ruffled boots.
These were not dissimilar from the boots usually worn by Camilla, Duchess of Cornwall.
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The Platinum Jubilee pageant occurred later in the afternoon.
This was the grand finale of the four-day Platinum Jubilee bank holiday weekend.
Beatrice and Eugenie attended along with their husbands and children, minus baby Sienna.
The Queen appeared on the balcony along with Kate Middleton, Prince William, their three children, and Prince Charles and Camilla.