In a night of unparalleled elegance, Princess Catherine, the Princess of Wales, and Sophie, the Duchess of Edinburgh, turned heads at a glittering state banquet held at Windsor Castle on December 3, 2025. The event, hosted by King Charles III and Queen Camilla, welcomed German President Frank-Walter Steinmeier and his wife, Elke Büdenbender, marking the first German state visit to the UK in nearly three decades.

Princess Catherine made a breathtaking entrance in a custom icy blue sequin gown by Jenny Packham, featuring a flowing cape and intricate embellishments that caught the light with every step. The true highlight, however, was her choice of headpiece: Queen Victoria’s Oriental Circlet Tiara, a rarely seen masterpiece not worn publicly in 20 years. Designed in 1853 by Prince Albert for his beloved Queen Victoria, the tiara boasts over 2,600 diamonds arranged in lotus flowers and Mughal arches, with opals originally incorporated (later replaced). This marked Catherine’s debut of the grand piece – her largest tiara to date – signaling her growing prominence in the royal family. Paired with earrings from Queen Elizabeth II’s collection and her Royal Family Orders, she embodied regal poise, seated beside the German president during toasts.

Not to be outshone, Duchess Sophie radiated sophistication in a midnight blue velvet gown, accessorized with her signature Aquamarine Tiara, a personal favorite featuring a central large aquamarine stone surrounded by diamonds in a wave-like design. This convertible jewel, which can also be worn as a necklace, has been a staple for Sophie at formal events. She complemented it with sparkling platforms and the Royal Family Orders of both Queen Elizabeth II and King Charles III, adding layers of sentimental meaning.

Kate sparkles in tiara designed by German-born Prince Albert for state banquet | The Standard

The banquet, set in the festively decorated St. George’s Hall with a towering Christmas tree, blended British and German culinary influences while underscoring strong bilateral ties. King Charles delivered a speech emphasizing unity and support for Ukraine, echoed by President Steinmeier’s warm response highlighting enduring friendship.

These appearances continue a tradition of tiara diplomacy, where jewels convey history and respect. Princess Catherine’s selection of the Oriental Circlet – an heirloom reserved for queens – nodded to its German origins through Prince Albert, while Sophie’s aquamarine choice evoked timeless elegance linked to the late Queen Elizabeth II. Other royals, including Queen Camilla in the Girls of Great Britain and Ireland Tiara and Princess Anne in a classic festoon design, added to the spectacle.

The evening reinforced the monarchy’s role in fostering international relations through pageantry and symbolism. As the royals toasted to shared values, Catherine and Sophie’s luminous looks reminded the world of the enduring allure of British royal glamour, blending heritage with modern grace in a display that captivated global audiences.