Photo: Getty
Photo: Getty

Kate Middleton made a stunning appearance at Buckingham Palace tonight when she showed up in a bright red Jenny Packham gown, but it was Princess Diana‘s tiara atop her head that really had people talking.

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Photo: Getty
Photo: Getty

The Duchess of Cambridge wore one of her late mother-in-law’s favorite tiaras, the Cambridge Lover’s Knot, according to People, at the annual Diplomatic Reception. The princess originally received it as a wedding gift from the Queen in 1981, The Telegraphreports.

Although it’s often associated with Diana, the tiara itself is actually over 100 years old. It was first commissioned by Queen Mary in 1913 or 1914 and made by Garrard, a famed jeweller to the British royal family.

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Diana wears the Cambridge Lover’s Knot in the ’80s. Photo: Getty

This actually isn’t the first time Middleton has worn the tiara. She previously stepped out in the jewels a year ago at the same reception, this time with a white dress. Either way, the jewels make a stunning accessory on both royals.

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Kate Middleton wears the Cambridge Lover’s Knot in December 2015. Photo: Getty

From: Harper’s BAZAAR US