Meanwhile, the Duke and Duchess of Cambridge are due to travel to Paris for an official two-day state visit - and their first since they married - on Friday to meet with diplomats and terror attack victims.
The two-day visit is Prince William's first official trip to the French capital since the tragic death of his mother Diana, the Princess of Wales, in a vehicle accident at the Pont de l'Alma tunnel two decades ago.
During their tour of the hospital, where they also met veterans, news came in of the attack at Orly airport, although this did not appear to affect the royal schedule.
An aide said of the meeting:'They are very grateful that the President has invited them to the the Elysee Palace for a meeting at the very start of their trip, which gives you an indication of the importance and status of the visit'.
Going out of Paris for some sporty bonding, Kate and Prince William were spotted at the Stade de France in Saint-Denis to witness the Six Nations tournament Rugby Union where France beat Wales.
Kate Middleton has given us a real fashion show for his first official visit to Paris, meant to strengthen the bonds of the Franco-British friendship in times of Brexit.
Professional Dad Dancer Prince William was recently caught raising the roof and putting his arm around a mystery woman during a ski trip, and Kate Middleton is reportedly less than thrilled.
In the short video, obtained by The Sun, Prince William - dressed in a pale blue shirt - places his hand on the waist of a dark-haired partygoer before leaning in towards her.
Kate Middleton wore a green wool coat - a bespoke design by Catherine Walker.
Continuing on their peaceful streak, they seemed to be enjoying Musee d'Orsay where they were photographed while taking in the beauty of the enormous clock.
Kate Middleton stunned during her visit to Paris with Prince William this weekend. Prince William had gone on a boys' ski trip and even skipped the royal family's Commonwealth Day service.
For more from the royals, watch the clip below!
William pledged Friday that Britain will retain close links with France despite Brexit as they attended a star-studded dinner at the British embassy with film stars Jean Reno, Audrey Tautou and Kristin Scott-Thomas.