"The late Queen [Elizabeth] was always very conscious of that extraordinary and challenging role of the No. 2," royal biographer Robert Hardman, author of The Making of a King, tells PEOPLE in this week's exclusive cover story.

Kate Middleton, Prince William and their 3 kids celebrate VE Day in London, plus Sabrina Carpenter, Lady Gaga and more. From New York to Monaco and everywhere in between, see what your favorite stars are up to.

Prince George, Princess Charlotte and Prince Louis attended the 80th anniversary of VE Day military procession at Buckingham Palace.