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Kate Middleton Just Wore a $135 Million Heirloom Tiara That Was One of Princess Diana's Favorite Pieces
["Ellen O'Brien", 'Ellen Is An Editor At Brides.', "Brides'S Editorial Guidelines"]
Brides | Wedding Ideas, Planning & Inspiration
Key Takeaways Kate Middleton opted to wear Queen Mary's Lover's Knot Tiara for the state dinner at Windsor Castle on September 17, 2025.
The heirloom piece is estimated to be worth $135 million.
She accessorized her look with drop earrings that once belonged to Queen Elizabeth and Queen Mary's Lover's Knot Tiara.
What Is the Significance of the Lover's Knot Tiara?
In 1981, she reportedly gifted the diadem to Princess Diana for her wedding to Prince Charles.
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