The Duke and Duchess of Cambridge shared a touching social media post to send wishes to the Duchess of Cornwall on her 74th birthday on Saturday.
Prince William and Kate posted a photo of Camilla wearing a chic navy blazer and polka dot skirt on their Instagram Stories.
The royal couple captioned the image "Wishing the Duchess of Cornwall a very happy birthday today!" followed by a balloon emoji.
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Camilla is Prince William and Prince Harry's stepmother after her marriage to Prince Charles in April 2005, when she became the Duchess of Cornwall.
She has two children from her first marriage to Andrew Parker Bowles; Tom Parker Bowles and Laura Lopes.
Kate and William shared this message on Instagram
Laura's daughter, Eliza, had a starring role as a bridesmaid at William and Kate's royal wedding in 2011 when she was just three.
Camilla has five grandchildren in total, with Laura also a parent to twins, Gus and Louis, while Tom has two children, Lola and Freddy.
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The royals at the G7 Summit in June
Meanwhile, the Prince of Wales is a grandfather to William and Kate's three children, Prince George, seven, Princess Charlotte, six, and three-year-old Prince Louis, as well as the Duke and Duchess of Sussex's children, Archie, two, and one-month-old Lilibet.
Charles, Camilla, William and Kate were last pictured together publicly with the Queen at the G7 Summit in Cornwall in June.
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