Duchess Sophie is spectacular in dripping diamonds and breathtaking tiara

Sophie at Buckingham Palace in petrol blue gown and tiara
Sophie during the State Banquet at Buckingham Palace for first state visit here by a South African leader since 2010 (Getty)

The Duchess of Edinburgh looked truly spellbinding on Tuesday night as she was seen making her way along the East Gallery at Buckingham Palace to attend a state banquet hosted by King Charles and Queen Camilla for Emperor Naruhito and Empress Masako of Japan.

Duchess Sophie, 59, was seen wearing a brand new couture gown from Suzannah London in a deep green hue. The gown featured a tailored waistline, a full princess skirt, and a fitted bodice.

Ms Julia Longbottom (L), Prince Edward, Duke of Edinburgh, Sophie, Duchess of Edinburgh and H.E. Mr. Hirofumi Nakasone (R) make their way along the East Gallery
Duchess Sophie dazzled in a tiara previously worn by the Princess of Wales (Getty)

The V-necked number was teamed with a magnificent array of dazzling diamond jewels. Sophie was seen wearing The Lotus Flower Tiara on loan from her sister-in-law Queen Camilla, as well as the incredible Diamond Chandelier Drop Earrings and Necklace.

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The Lotus Flower Tiara was worn by the Princess of Wales at the Diplomatic Corps reception in 2022. She styled the diadem, which was originally made by the House of Garrard in 1923 for the Queen Mother, with a custom red Jenny Packham gown covered in beaded embellishment.

Kate in red beaded dress
The Princess of Wales wore the tiara in 2022 (Getty)

Rounding off the Duchess' look was the 'Maud' clutch in silver from Anya Hindmarch. Her sandy blonde locks were styled in a sweeping updo and her makeup was impeccable as always with fluttery eyelashes.

Queen Camilla with Empress Masako, Emperor Naruhito and King Charles
Camilla debuted the family order at the State Banquet (PA Images / Alamy Stock Photo)

Queen Camilla matched Sophie's magnificent energy. She wore a white couture gown from Fiona Clare with the amazing Burmese Ruby and Diamond Tiara, as well as Queen Elizabeth’s Festoon Necklace.

Prince William and a woman walking behind Queen Camilla and Empress Masako
Camilla and the Empress wore white (PA Images / Alamy Stock Photo)

Empress Masako of Japan looked splendid in a white lace-adorned dress with the dazzling Imperial Chrysanthemum Tiara. Also in attendance at the momentous event was the Prince of Wales, the Duke and Duchess of Gloucester, and Keir Starmer and his wife Victoria.

The Duchess of Edinburgh's state banquet style

The royal was last seen at a Buckingham Palace state banquet last November when the King hosted South Korea's President Yoon Suk Yeol and his wife Kim Keon Hee on their first day of the three-day state visit to the UK.

The Duchess of Edinburgh in a white gown
Sophie stunned in a white gown last November (WPA Pool)

The mother-of-two looked beautiful in a white Suzannah London floor-length dress with a sheer panel across the shoulders with floral embroidery detailing. The garment cinched at the waist and was teamed with her Aquamarine Tiara.

Sophie at Buckingham Palace in petrol blue gown and tiara
Sophie wore her aquamarine tiara to the State Banquet at Buckingham Palace last November (Getty)

She re-wore the same diadem the year prior when the royal family hosted the president of South Africa with a Suzannah petrol blue gown with a wrap-style bodice.

Beautiful in blue

The Duchess of Edinburgh looked beautiful in blue
The Duchess of Edinburgh looked beautiful in blue (Shutterstock)

Prior to the state banquet, Prince Edward's wife was seen at the Royal Windsor Cup Final wearing a sleeveless shirt dress in powder blue from Emilia Wickstead with the 'High Mary Jane Leather Espadrille' from Penelope Chilvers and the 'Paloma' bag from Sophie Habsburg.

Radiant Sophie looked beautiful in blue
Radiant Sophie wore a floral headband (David Hartley/Shutterstock)

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Prince William's aunt rounded off her look with an unexpected accessory – a floral printed headband.