Kate Middleton gave a sweet, subtle nod to Queen Elizabeth with one of her fashion choices for an event Tuesday evening.

The Duchess of Cambridge, 38, attended a special performance of the musical "Dear Evan Hansen" at the Noel Coward Theatre in London with husband Prince William.

For the outing, the mom of three opted for a three-quarter sleeve dress by Eponine as well as sparkly Jimmy Choo heels and a matching clutch, according to People. Per the outlet, Middleton's diamond chandelier earrings are from the queen.

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Kate Middleton attends a charity performance of 'Dear Evan Hansen' in aid of The Royal Foundation at the Noel Coward Theatre on February 25, 2020 in London, England. (Max Mumby/Indigo/Getty Images)

Middleton -- who has previously borrowed Queen Elizabeth's jewelry -- has worn this pair of earrings to multiple outings, including in 2011 for a British Academy Film Awards dinner in Los Angeles, as well as the 2017 Variety Performance and the Tusk Conservation Awards in 2018, according to People.

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In a post on the Cambridges' official Instagram page, it was explained that the event was held on behalf of The Royal Foundation.

Kate Middleton has worn this pair of diamond chandelier earrings from Queen Elizabeth for multiple events.  (Max Mumby/Indigo/Getty Images)

"The musical @dearevanhansen has been credited with helping to start important conversations about mental health between parents and teenagers," the statement read.

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It continued: "The issue of mental health is a key priority for The Royal Foundation which works to tackle the stigma and encourage more people to talk openly about their mental health."

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"@GiveUsAShoutInsta, a free and confidential 24/7 UK text messaging helpline that supports people in crisis and was developed by The Royal Foundation, is one of four not-for-profit partners of the show which provide mental health resources to audiences and beyond," the statement concluded.