Princess Beatrice and her husband Edoardo Mapelli Mozzi have been seen leaving Clarence House following the King's cancer diagnosis.
The royal couple were seen leaving one of the King's royal residences in the early hours of this morning.
Buckingham Palace announced on Monday evening that the King had been diagnosed with cancer.
It comes just weeks after Princess Beatrice's mother Sarah Ferguson revealed her own skin cancer battle in an emotional post on Instagram.
Princess Beatrice and her husband Edoardo Mapelli Mozzi have been pictured leaving Clarence House following the King's cancer diagnosis.
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The King and Queen Camilla were supporting the Duchess of York following her second diagnosis in seven months.
In January, Sarah Ferguson issued a statement following her skin cancer diagnosis.
Fergie said that the diagnosis had come as a shock but she remained in good spirits.
She wrote on Instagram: "I have been taking some time to myself as I have been diagnosed with malignant melanoma, a form of skin cancer, my second cancer diagnosis within a year after I was diagnosed with breast cancer this summer and underwent a mastectomy and reconstructive surgery.
"It was thanks to the great vigilance of my dermatologist that the melanoma was detected when it was.
"Naturally another cancer diagnosis has been a shock but I’m in good spirits and grateful for the many messages of love and support.
"I believe my experience underlines the importance of checking the size, shape, colour and texture and emergence of new moles that can be a sign of melanoma and urge anyone who is reading this to be diligent.
"I am incredibly thankful to the medical teams that have supported me through both of these experiences with cancer and to the MAYRLIFE Clinic for taking gentle care of me in the past weeks, allowing me time for recuperation.
"I am resting with family at home now, feeling blessed to have their love and support."
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Buckingham Palace is not sharing any further details on the King's diagnosis.
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Buckingham Palace is not sharing any further details on the King's diagnosis.
A royal aide told the Mail: "No further details are being shared at this stage, but His Majesty is receiving expert care and looks forward to returning to full public duty as soon as possible."
While a royal source said regarding the monarch's decision to go public with his diagnosis: "The King has elected to make his diagnosis public once the schedule of treatment had begun, noting that as Prince of Wales, he was patron of a number of cancer-related charities.
"In this capacity, His Majesty has often spoken publicly in support of cancer patients, their loved ones and the wonderful health professionals who help care for them.
"His Majesty is grateful to his medical team for their expert care and swift intervention, is wholly positive about his treatment and looks forward to returning to full public duty as soon as possible."