Lady Louise Mountbatten with Princess Theodora of Greece (left) and Princess Margarita of Greece (right), daughters of Prince Andrew of Greece and Denmark, and sisters of the Duke of Edinburgh. (Photo by PA Images via Getty Images)
Lady Louise Mountbatten with Princess Theodora of Greece (left) and Princess Margarita of Greece (right), daughters of Prince Andrew of Greece and Denmark, and sisters of the Duke of Edinburgh. (Photo by PA Images via Getty Images)