Royals WATCH: Prince William Shares a Laugh with 6-Year-Old Cancer Patient: 'He's Too Old for Me to Marry!' Prince William evoked memories of his late mother, Princess Diana, as he shared a special moment with a young cancer patient By Simon Perry Published on May 16, 2017 09:14 AM Share Tweet Pin Email Photo: Kirsty Wigglesworth - WPA Pool/Getty Images Prince William evoked memories of Princess Diana as he shared a special moment with a young cancer patient at the Royal Marsden Hospital, where he has been president for 10 years. The royal dad, who took over the role from his late mother, chatted with 6-year-old leukaemia patient, Daisy, as he helped her put on a name tag while she sat for her treatment. The young patient was all smiles as the prince gently fastened the I.D. band to her wrist. “I’m always the pilot…I’m not trusted with the special stuff,” he told her with a laugh. “How’s that? Is that okay? Is that loose or alright?” Daisy smiled and nodded as she held her stuffed penguin. FROM PEN: What’s Next for Princess Charlotte “He’s too old for me to marry,” the princess-obsessed little girl from Kingston, Surrey, told reporters, adding that she enjoyed being cared for by the future King. “It was fun,” she said. AP Photo/Kirsty Wigglesworth, Pool William later joined two play specialists and patients in the play room for arts and crafts activities, providing a much-needed morale booster for young royal fan Zak Gillard, who was diagnosed with a rare brain tumor on Tuesday, two-and-a half weeks after waking up suddenly unable to walk. AP Photo/Kirsty Wigglesworth With this year marking the 20th anniversary of Diana’s death, William and his brother Prince Harry have been commemorating their late mother’s achievements, especially when they dovetail with their own public work. William, who is formally known as President of the Royal Marsden NHS Foundation Trust, accompanied staff as he got to know more about the work at the hospital. The hospital has an international reputation for ground-breaking research and pioneering treatments and technologies, and the prince kicked off his visit in the radiotherapy department, where he spoke with clinicians about the U.K..’s first MR Linac, a state-of-the-art machine set to make radiotherapy more effective and reduce side effects for cancer patients. He then headed to the Oak Centre for Children and Young People where he was with two staff nurses, supporting them in calling patients for chemotherapy treatment and checking blood pressure. The Royal Marsden is the largest and one of the best-known cancer centers in Europe, treating over 50,000 NHS and private patients every year.