PARIS, FRANCE - MARCH 17: Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend a dinner at the British Embassy on March 17, 2017 in Paris, France. The Duke and Duchess are on a two day tour of France. (Photo by Pool/Samir Hussein/WireImage)

PARIS, FRANCE - MARCH 17:  Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend a dinner at the British Embassy on March 17, 2017 in Paris, France. The Duke and Duchess are on a two day tour of France.  (Photo by Pool/Samir Hussein/WireImage)

PARIS, FRANCE - MARCH 17: Catherine, Duchess of Cambridge and William, Duke of Cambridge attend a dinner at the British Ambassador's Residence on March 17, 2017 in Paris, France. on March 17, 2017 in Paris, France. The Duke and Duchess are on a two day tour of France. (Photo by Laurent Vu-SC Pool - Corbis/Corbis via Getty Images)

PARIS, FRANCE - MARCH 17:  Catherine, Duchess of Cambridge  and William, Duke of Cambridge attend a dinner at the British Ambassador's Residence on March 17, 2017 in Paris, France.  on March 17, 2017 in Paris, France. The Duke and Duchess are on a two day tour of France.  (Photo by Laurent Vu-SC Pool - Corbis/Corbis via Getty Images)

PARIS, FRANCE - MARCH 17: Catherine, Duchess of Cambridge attends a a dinner at the British Ambassador's redidence on March 17, 2017 in Paris.France.France. (Photo by Laurent Vu - SC Pool - Corbis/Corbis via Getty Images)

PARIS, FRANCE - MARCH 17:  Catherine, Duchess of Cambridge attends a a dinner at the British Ambassador's redidence on March 17, 2017 in Paris.France.France.  (Photo by Laurent Vu - SC Pool - Corbis/Corbis via Getty Images)

PARIS, FRANCE - MARCH 17: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge and Anne Llewellyn attend a dinner at the British Embassy on March 17, 2017 in Paris, France. The Duke and Duchess are on a two day tour of France. (Photo by Pool/Samir Hussein/WireImage)

PARIS, FRANCE - MARCH 17:  (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge and Anne Llewellyn attend a dinner at the British Embassy on March 17, 2017 in Paris, France. The Duke and Duchess are on a two day tour of France. (Photo by Pool/Samir Hussein/WireImage)

PARIS, FRANCE - MARCH 17: (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge attend a dinner at the British Embassy on March 17, 2017 in Paris, France. The Duke and Duchess are on a two day tour of France. (Photo by Pool/Samir Hussein/WireImage)

PARIS, FRANCE - MARCH 17:  (NO UK SALES FOR 28 DAYS) Catherine, Duchess of Cambridge  attend a dinner at the British Embassy on March 17, 2017 in Paris, France. The Duke and Duchess are on a two day tour of France. (Photo by Pool/Samir Hussein/WireImage)