At the age of 4, then-Princess Elizabeth became an older sibling. Her sister Princess Margaret was born in August 1930, and the two little girls had an undeniable and unbreakable bond from the start. The princesses were educated together by a governess at their home in London until 1936, when their father, the Duke of York, reluctantly took the throne after his brother Edward’s abdication. Along with their parents, King George VI and the Queen Mother, the young girls moved into Buckingham Palace. . . and their lives basically changed forever.