Kate Middleton is holding her head up high.

The Princess of Wales, 43, sported the biggest tiara she’s worn to date when the royals attended a glamorous event at Windsor Castle on Wednesday in honor of German President Frank-Walter Steinmeier’s state visit to the UK.

Prince William and Princess Kate at an event honoring German President Frank-Walter Steinmeier on Dec. 3, 2025.POOL/AFP via Getty Images
Princess Kate was joined by her husband, Prince William, King Charles and Queen Camilla.

Middleton sported Queen Victoria’s Oriental Circlet tiara for the first time, a blue Jenny Packham dress and a pair of the late Queen Elizabeth’s earrings.

She accessorized with the Royal Family Order and the Royal Victorian Order sash and star and a black clutch.

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Princess Kate stuns in Queen Victoria’s Oriental Circlet tiara.POOL/AFP via Getty Images
The gigantic headpiece is the fifth one Princess Kate has ever worn.

According to Garrard, in 1853, Queen Victoria’s husband, Prince Albert, had the tiara crafted for her. The exquisite accessory features 2,600 diamonds and was also worn by the Queen Mother and Queen Elizabeth.

Meanwhile, Middleton first wore a tiara during her 2011 wedding to Prince William, 43. For her walk down the aisle, the royal donned the Cartier Halo tiara.

In July, Princess Kate wore Queen Mary’s Lover’s Knot tiara during the French state visit. Then, in September, Princess Kate re-wore the tiara for President Trump and First Lady Melania Trump’s state visit.

The princess has also sported the Lotus Flower tiara and the Strathmore Rose tiara.

The gigantic headpiece is the fifth one Princess Kate has ever worn.POOL/AFP via Getty Images
Princess Kate’s dazzling accessory comes on the heels of her rocking long, bright blonde locks.

Last month, she attended the Royal Variety Performance in London and revealed the reason behind the change. The royal family member told actress Su Pollard what spurred her lighter hair.

Kate Middleton arrives for a visit to the Natural History Museum’s newly renovated gardens on Sept. 4.Getty Images

The Prince and Princess of Wales during the state visit by the President Donald Trump on Sept 17.Getty Images
The British singer, 76, said she complimented Middleton, telling her: “I like your hair, it looks a lot lighter,” per the Daily Mail.

“It used to be brown, but it’s gone light in the sunshine,” the princess reportedly responded.

In September, the Prince and Princess of Wales stepped out at the Natural History Museum’s gardens in London, with Kate showing off her honey-tinted locks.

This marked the first time she sported a lighter tone on her thick hair.

Two days later, while at the Women’s Rugby World Cup, Middleton’s hair was notably darker. This time, it looked like the princess went back to her brunette roots.