Duchess Camilla celebrated a milestone birthday Sunday.

The Duchess of Cornwall received warm wishes from several members of the Royal Family in honor of her 75th birthday. In a special personal touch, Prince William and Duchess Kate shared their message along with one of the photos from Camilla's cover shoot for this month’s Country Life magazine.

The image—which was photographed by Duchess Kate in the garden of Duchess Camilla's private Wiltshire home, Ray Mill—shows the future queen consort standing in a field of forget-me-nots, which match her floral shirtdress and cardigan. Camilla guest edited the issue to mark her birthday and the publication's 125th anniversary.

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"Wishing a very happy 75th birthday to The Duchess of Cornwall today!" the royal couple wrote alongside the photo.

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Queen Elizabeth II also celebrated Duchess Camilla through social media, sharing a warm message alongside a sweet photo. In the pic, the duchess is seated on a painted red wagon, smiling as she holds her dog, Beth.

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Per Associated Press, the duchess planned to celebrate the occasion with a small family dinner at Prince Charles' Highgrove estate in southwest England.

In her Country Life cover photo, which emphasizes Camilla's love of the outdoors, the royal smiles as she sits on a wooden bench in her garden, while holding a basket of pelargoniums.

"We are thrilled to have our Guest Editor captured so magnificently by royal photographer The Duchess of Cambridge," Editor in Chief of Country Life, Mark Hedges, said in a statement. "We understand this is the first time a formal portrait of The Duchess of Cornwall has been taken by The Duchess of Cambridge for a magazine and we are honoured to have been chosen to be the first to publish this beautiful photograph. The photographs are superb and we would be delighted to offer The Duchess of Cambridge another commission!"