She oozed elegance while meeting dignitaries at the Diplomatic Reception held in Buckingham Palace on Tuesday night (December 6).
The Princess of Wales was joined by her husband William, the Prince of Wales, her father-in-law his majesty The King and Queen Consort Camilla.
Pictures from inside the event show Kate speaking to people as she dazzled in her stand-out outfit, complemented with a blue sash.
Tweeting the pictures from the Royal Family account, four snaps show the family members carrying out their duties at the ceremony.
"The King and The Queen Consort, accompanied by The Prince and Princess of Wales, this evening hosted the Diplomatic Reception," the Tweet read.
"Hosted annually at Buckingham Palace, the reception celebrates the presence in London of one of the largest Diplomatic Corps in the world."
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