Prince William and Kate Middleton delivered a royal masterclass in diplomacy and style at the first state banquet of 2026, held at Windsor Castle to honor Nigeria’s President Bola Ahmed Tinubu and First Lady Oluremi Tinubu. The Prince and Princess of Wales dazzled guests, combining regal sophistication with modern elegance, and cementing their role as the monarchy’s most poised public-facing figures.
Kate Middleton was breathtaking in a floor-length emerald green gown by Andrew Gn, a nod to the colors of Nigeria’s flag. The gown featured billowing cuffed sleeves, a mock neckline, and a pleated skirt, balancing regal formality with effortless fluidity. Her look was completed with diamond and gemstone chandelier earrings from the Queen Mother’s collection, King Charles’s Royal Family Order badge, and the Royal Victorian Order sash and star. Crowning the ensemble was her signature Queen Mary’s Lover’s Knot Tiara, famously worn by Princess Diana and valued at $135 million.
In December 2025, Kate debuted Queen Victoria’s Oriental Circlet Tiara, the largest tiara she’s ever worn, featuring 2,600 diamonds and previously unseen in public for two decades. Across her royal career, she has worn only five tiaras: the Cartier Halo, Lotus Flower, Strathmore Rose, Queen Mary Lover’s Knot, and Queen Victoria’s Oriental Circlet Tiara. Each appearance demonstrates a thoughtful balance of heritage, symbolism, and high-fashion elegance.
Earlier in the day, William and Kate warmly welcomed the Nigerian First Couple, reflecting the elevated diplomatic role they’ve embraced since King Charles III ascended the throne in September 2022. In 2025, the couple starred in all three of the U.K.’s inbound state visits, from France in July, the U.S. in September, and Germany in December, consistently showcasing the monarchy’s evolving image.
Royal biographers hailed Kate’s poise and presence. Ingrid Seward told People that Kate is “very aware” of the spotlight at state events and displays “traits of a remarkable future queen” with a smile that captivates everyone. Robert Jobson added that “she doesn’t just represent the monarchy, she embodies its evolution… she is the jewel in the Crown.” Russell Myers emphasized Kate’s critical role in shaping the monarchy’s vision for the future, while Emily Nash highlighted the Prince and Princess of Wales’ strong partnership as key to providing their children with a loving upbringing, vital for the monarchy’s long-term stability.
From her carefully chosen tiara to the emerald elegance of her Andrew Gn gown, Kate Middleton once again proved why she is the monarchy’s style icon and a symbol of grace, sophistication, and forward-looking leadership.
