The Duchess of York arrived at the prestigious flower show with her husband Edoardo Mapelli Mozzi who wore a stylish dark grey suit.
The princess sported a fitting blue and white floral dress with her hair half tied up with a black ribbon and matching back heels and handbag.
Beatrice, 33, occasionally attends public events as a member of the Royal Family but her and sister Eugenie, 31, are private citizens and each have their own careers.
Other royals, including the Queen, also made it to the world-famous event in London on Monday.
The monarch, who only confirmed her attendance in the eleventh hour, is the patron of the Royal Horticultural Society – which runs the event every year.
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