Kate Middleton Glams Up in Princess Diana’s Beloved Tiara for Royal Banquet

Kate Middleton delivered pure royal glamour during a high-profile evening at Windsor Castle. The Princess of Wales attended the official state banquet held in honor of Oman, immediately capturing attention with an exquisite wardrobe choice steeped in royal history. For the formal gathering, she turned to a sparkling staple from the vault: Queen Mary’s Lover’s Knot tiara, a breathtaking diamond-and-pearl heirloom famously cherished by Princess Diana. State banquets consistently serve as premier fashion moments on the royal calendar, and this appearance proved no exception. Standing alongside senior members of the royal family, Kate paired the storied headpiece with a vibrant, Grecian-style yellow evening gown crafted by designer Elie Saab. The flowing ensemble brought a radiant burst of color to the historic state rooms of Windsor Castle.

The centerpiece of Kate's evening look was undoubtedly Queen Mary’s Lover’s Knot tiara. Originally commissioned in the early twentieth century by Queen Mary, the ornate accessory features hanging drop pearls framed by intricate diamond knots. It eventually became one of the most recognizable pieces in the royal collection after Queen Elizabeth II loaned it to Princess Diana following her marriage to then-Prince Charles. Diana frequently selected the Lover's Knot for diplomatic receptions and global tours, making it an inseparable part of her legendary fashion legacy. In recent years, Kate has adopted the signature sparkler as her primary choice for lavish diplomatic affairs. By wearing it once again for the Oman state dinner, she honored the enduring heritage of the jewelry while channeling a modern elegance that has become her trademark.

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To complement the historic jewelry, the Princess of Wales selected a bright yellow gown designed by Lebanese couturier Elie Saab. Known for dramatic draping and timeless red-carpet elegance, the designer created a flowing, Grecian-inspired silhouette that balanced modern luxury with the traditional decorum required of a royal host. Kate has previously turned to Elie Saab for major royal events, relying on the luxury fashion house for intricate embroidery and soft, romantic silhouettes. Pairing the warm pastel gown with gleaming diamonds and pearls created a striking contrast under the castle chandeliers, reaffirming her status as a global style icon during one of Britain's most formal diplomatic gatherings.