Queen Camilla stunned in red as she attends the white tie and tiara event alongside her husband and other senior royals as part of the president of South Korea's official visit to the UK.
The 76-year-old royal stunned fans in a gorgeous red Fiona Clare Aldridge gown and also sported the late Queen's Ruby and Diamond Burmese Tiara to mark the occasion.
The tiara, which is estimated to cost around £5million, is complete with rubies that the late Queen was gifted upon her wedding day in 1947.
The King and Queen are currently hosting President Yoon Suk Yeol and his wife Kim Keon Hee as part of their three-day visit to the UK.
The royal couple treated the President and First Lady to a private lunch at Buckingham Palace earlier today, with the pair having arrived at Stansted Airport yesterday afternoon.
Tonight 170 guests gathered for the banquet in the opulent Palace ballroom, where both the King and Mr Yoon made speeches.
The pair led royals at the banquet, in which senior royals such as the Prince and Princess of Wales were in attendance.
Earlier on Tuesday, the Prince and Princess of Wales had the honour of greeting the President and the First Lady.
In true royal style, the pair then received a full royal welcome on Horse Guards Parade.
After receiving the royal salute from a guard of honour, the guests, as well as the King, Queen and Prince and Princess of Wales, made their way along The Mall in a carriage procession.
A private lunch was then hosted at the official London residence of Buckingham Palace.
The couples then paid a visit to see Royal Collection exhibits in the Picture Gallery.
Taking on a prominent role earlier in the day, the Prince and Princess of Wales met the Korean couple at their hotel on Tuesday morning.
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Despite the King and Queen's role of hosting the guests, Prince William and Princess Kate seemingly showed their stance in the monarchy with this act on the visit.
South Korea's President Yoon Suk Yeol and his wife, First Lady Kim Keon Hee travelled into Stansted Airport on Monday, November 20.
November 21 marked the couple's first official day in the UK, with the visit set to last three days.