William and Kate helped to launch a crisis text line called Shout with Harry and Meghan.
The presenter has said the Royals "don't just pay lip service" to veterans' charities.
William praised the selfless commitment of NHS workers as he opened the latest field hospital.
If the Queen was to contract coronavirus, her son Prince Andrew and grandson Prince Harry could be called on to represent her.
The presenter was formerly engaged to skateboarded Jesse Jenkins before going on to marry Jesse Wood, son of The Rolling Stone's Ronnie Wood.
The Duke of Cambridge has said it would be "absolutely fine by me" if George, Charlotte and Louis came out as gay or lesbian in future.
"Our hearts go out to the families and friends of the people who lost their lives in the devastating attack in Christchurch."
The Duke of Cambridge interviewed the historian and broadcaster at the World Economic Forum in Davos, Switzerland.
The Duke of Cambridge met with representatives of United for Wildlife to observe their work at Heathrow Airport.
Prince George, royal rapscallion and older brother to Charlotte and Louis, turned five on Sunday and Kensington Palace knows just how to grab our attention: with an adorable photo release of the birthday boy. SEE ALSO: Prince George and Princess Charlotte look seriously adorable in new royal christening photos The photo shows the five-year-old style icon smiling in all his glory like a child who doesn't yet realize the burden of being third in line to the throne or isn't at all bothered by the attention his new Aunt Meghan is getting. The Duke and Duchess of Cambridge are very pleased to share a new photograph of Prince George to mark his fifth birthday – thank you everyone for your lovely messages 🎈📷 @mattporteous pic.twitter.com/KJ4c73ospG — Kensington Palace (@KensingtonRoyal) July 21, 2018 The photo was taken on July 9 as part of the christening of Prince Louis but wasn't released until Saturday ahead of George's birthday. There's no word on what the prince's plans were for his fifth birthday but if there's any justice in the palace, he celebrated with cake, ice cream, presents, maybe a magician, and, if he was <em>truly</em> blessed, a bounce house. WATCH: Meghan Markle is a princess (okay, duchess) now and the Internet celebrated with memes