King Charles and Queen Camilla gave a wave towards well-wishers as the couple attended the Divine Service at St Mary Magdalene in Sandringham.
The pair looked smart upon their arrival, both wrapping up in the relatively mild conditions.
The King was wearing his usual oatmeal-hued winter coat and grey suit, holding an umbrella in his hand.
Charles was greeted by Reverend Canon Paul Williams before heading into the church.
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Camilla kept warm with her longline coat and fur hat, wearing leather gloves and knee-high boots.
The couple were without Princess Anne and husband, Sir Timothy Laurence, who joined them at church last weekend.
It has been a busy weekend of public outings for the King, having paid an unexpected visit to runners who were taking part in a local Sandringham parkrun for the second year in a row.
The parkrun, which was organised in partnership with the Move Against Cancer charity, saw runners shocked to see Charles watching from the sidelines.
Charles was greeted by Reverend Canon Paul Williams
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The jog was set up to support those living with and beyond cancer, as well as families, friends, and healthcare professionals.
Charles chatted with local members of Move Against Cancer's 5K Your Way (5KYW) group.
The royal family's Instagram account also posted photographs of the King waving at the runners and greeting participants to promote the 5KYW's work.
The charity responded to Charles's visit in an Instagram post of their own, which read: "Almost speechless again!
The couple wrapped up in the relatively mild conditions
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"A heartfelt thank you to His Majesty The King for greeting us on the first lap of Parkrun in the beautiful setting of the Sandringham estate this morning.
"The sun was shining and lots of people were able to enjoy taking a moment, sharing their stories, and chatting with others as they navigated the course."
The 5KYW group participates in parkrun events on the last Saturday morning of each month and invites anyone affected by cancer to walk, jog, run, cheer, or volunteer at over 120 parkrun events across the UK and Ireland on those days.
Dr Lucy Gossage, an oncologist and co-founder of 5KYW, said: "A lot of our communities are living with cancer that's probably not curable, but you can still live a really good-quality life.
Camilla gave a wave towards well-wishers before heading in
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"And I guess the King is doing that: he's continuing working, despite a cancer diagnosis.
"And that's probably a really positive thing, something certainly that resonates with what we try to do at Move Against Cancer."
Parkrun was founded in 2004 and, more than 20 years on, hundreds of thousands of people across 22 countries and five continents take part in free, weekly, timed five-kilometre running events each weekend in parks around the world.
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