One user said: “Wow, I love the colour and the details of the dress on Beatrice. It’s a Zara Tindall-style dress!”
A second one commented: “She looks amazing in that colour! She just oozes happiness and contentment in her own body.” A third added: “Princess Beatrice is a beautiful woman. That colour complements her so much!”
It was a rare joint appearance with the King and Queen for Beatrice, who, even though she regularly attends various royal events, is not a working royal.
Various A-listers were spotted among the 250 of the evening, including Brazil’s former World Cup winning footballer Ronaldo, actor Ed Westwick and singer Sophie Ellis-Bextor
The event also saw the grand finale of the Big Egg Hunt fundraiser.
The campaign featured 123 giant egg sculptures designed by leading names from fashion, art and design that were displayed across London as part of a free art trail at sites including Buckingham Palace, Battersea Power Station, the Royal Albert Hall, Sloane Street and Canary Wharf.
Some of the eggs were on display in the grounds and guests were later able to bid for some of them at an auction held at the end of the evening.
Charles and Camilla also presented two special recognition awards on the night.
They went to Aaranyak, an organisation which works with Elephant Family in India, and artist Rebecca Campbell, who celebrates her tenth year as an ambassador for the charity.
