Catherine paid heartfelt thanks to those who have supported her and her husband, smiling broadly from the podium. "I am so grateful to everyone who has been there for William and me in the quietest of times," she said. She then announced that she would become joint patron with Prince William of the organisation that runs the hospital.

In this role, Catherine expressed her determination to help those facing similar challenges to her family. “Hopefully, by supporting cutting-edge research and improving clinical practice, we can save more lives and improve the experience of those affected by cancer,” she said.

The Duchess stressed the importance of maintaining comprehensive care during good and bad days. “Sometimes, loved ones need support just like I do when I am a patient,” she added. Catherine felt great about returning to hospital after completing her treatment, and shared her joy on social media about her illness entering remission.

Six months later, in September, she happily announced the completion of her treatment in a heartwarming video, showing her happy family life with William and their three children: Prince George, Princess Charlotte and Prince Louis. In the video, Catherine said she was entering a new phase of recovery, full of hope for the future.

The closeness of Catherine’s family is evident in the captured images. She held her children close and wrapped her arms around her husband as they lay on the sand. It was a rare moment of affection between the couple after 13 years of marriage. In a voiceover, the princess said that this time has reminded them to appreciate the simple but important things in life.

Fans were quick to express their joy at the princess's good news and were looking forward to the activities she had planned for the fall. She stressed the importance of looking after yourself during and after treatment. When a medical device beeped during the conversation, the princess recognized the sound.

The visit was also an opportunity for her to thank the staff for their care and compassion during a difficult year. She ended her message with words of sympathy for those continuing their own cancer journeys. A Kensington Palace spokesman said the purpose of the visit was to show gratitude and highlight the first-class care provided by the Royal Marsden.