LILLE, FRANCE - APRIL 09: Prince William, Duke of Cambridge and Prince Harry attend the commemorations for the 100th anniversary of the battle of Vimy Ridge on April 9, 2017 in Lille, France. (Photo by Samir Hussein/WireImage)
LILLE, FRANCE - APRIL 09: Prince William, Duke of Cambridge and Prince Harry attend the commemorations for the 100th anniversary of the battle of Vimy Ridge on April 9, 2017 in Lille, France. (Photo by Samir Hussein/WireImage)