The King and Queen attended an Easter service with other members of the royal family, including the Duke of York, on Sunday.
Andrew arrived at St George’s Chapel with the Princess Royal, his ex-wife Sarah, Duchess of York and Anne’s husband Vice Admiral Sir Tim Laurence.
The duke quickly entered the chapel ahead of his sister Anne as she spoke with the Dean of Windsor, the Right Rev Christopher Cocksworth outside.
The Prince and Princess of Wales did not attend the service, as they were spending the weekend with their children in Norfolk.
The Mirror reported that a source had said the couple chose to spend time together as a family before Prince George, Princess Charlotte and Prince Louis go back to school.
The Waleses, who have a country home, Anmer Hall, on the Sandringham estate, missed the annual service last year after Kate, who is now in remission, was diagnosed with cancer.
Last week, the Queen paid tribute to the King’s sense of duty saying he “loves his work” and wants to do “more and more and more” as he gets better.
Camilla said Charles, 76, who is receiving ongoing treatment for cancer, was “driven” by helping others and indicated his cancer journey was one of “recovery”.
Last month, the King experienced temporary side effects following treatment at the London Clinic, which required a short period of hospital observation that day.
Charles’s Easter Sunday appearance last year was his first major public one following his cancer diagnosis.
He was applauded by the crowds as he greeted well-wishers who urged him to “keep going strong”.
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