The King has attended church with the Queen in his first public outing since the announcement of his cancer diagnosis.
Walking alongside Camilla and holding an umbrella, Charles arrived at St Mary Magdalene Church in Sandringham, Norfolk, on Sunday morning.
The King was seen wearing a brown coat and waving to the public before being greeted by the Rev Canon Dr Paul Williams at about 10.50am.
He was diagnosed after a 鈥渟eparate issue of concern was noted鈥 and was investigated while he was being treated for a benign and unrelated prostate condition.
The 75-year-old King was seen in public for the first time since his cancer diagnosis as he left Clarence House in a car on Tuesday, the day after starting his treatment, following a brief reunion with the Duke of Sussex.
On Saturday the King thanked people for their 鈥渕any messages of support and good wishes鈥 and said it was 鈥渆qually heartening鈥 to hear how sharing his diagnosis has helped to promote public understanding of cancer.
In a message to the public, Charles said: 鈥淚 would like to express my most heartfelt thanks for the many messages of support and good wishes I have received in recent days.
鈥淎s all those who have been affected by cancer will know, such kind thoughts are the greatest comfort and encouragement.
鈥淚t is equally heartening to hear how sharing my own diagnosis has helped promote public understanding and shine a light on the work of all those organisations which support cancer patients and their families across the UK and wider world.
鈥淢y lifelong admiration for their tireless care and dedication is all the greater as a result of my own personal experience.鈥
The message was signed 鈥淐harles R鈥.
A host of medical professionals from different groups have commended the King鈥檚 candour over his health.
Chiara De Biase, director of support and influencing at Prostate Cancer UK, highlighted a 500% increase in people coming to the charity鈥檚 website for information and support in the week following the King鈥檚 announcement of his enlarged prostate condition in January.
The Prince of Wales may step in to represent his father at events, but no engagements are scheduled at the moment and the royal palaces will make arrangements if the need arises.
The King鈥檚 illness coincided with a hospital stay by the Princess of Wales, who underwent planned abdominal surgery.
