Prince Andrew and Sarah Ferguson have arrived at today's royal memorial service together.
The memorial service is being held in honour of King Constantine of the Hellenes at St George's Chapel.
The divorced royal couple appeared to be in good spirits as they arrived at the memorial service.
The Duchess of York, 64, announced in January this year that she had been diagnosed with malignant melanoma, a form of skin cancer.
Prince Andrew, Sarah Ferguson and Timothy Laurence walking into St George's Chapel
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It came less than a year after Fergie, as she is affectionately known, underwent a double mastectomy and reconstructive surgery following breast cancer.
Andrew and Sarah, who continue to cohabitate at Royal Lodge, were joined at the memorial service by several other members of the Royal Family.
These included the Tindalls, Princess Beatrice and Edoardo Mapelli Mozzi, and Queen Camilla.
Princess Anne and her husband Timothy Laurence were also in attendance.
Zara and Mike Tindall seen behind the Yorks at today's service
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King Charles, 75, was unable to attend today's memorial service.
The monarch has been diagnosed with a "form of cancer", meaning that he has had to postpone most public-facing royal duties while he seeks treatment.
Therefore, Queen Camilla led today's service at St George's Chapel.
Constantine II, Head of the Royal House of Greece, reigned as the last King of the Hellenes from 1964 to 1973.
Prince Andrew and Sarah Ferguson tied the knot in 1986 but divorced a decade later
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Queen Camilla also attended today's service
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He died in Athens in January last year at the age of 82.
Prince William, 41, has pulled out of attending today's memorial service for the late King Constantine of Greece at Windsor Castle due to a personal matter, according to Kensington Palace.
GB News understands that The Princess of Wales, who is recovering from abdominal surgery, is doing well.
The Prince of Wales called the Greek Royal Family to let them know he was unable to attend. The late King Constantine of Greece was William’s godfather.
