Happy Birthday to King Constantine of Greece! The only son of then Crown Prince Paul of Greece and Princess Frederica of Hanover, his older sister is Queen Sofia of Spain, and the younger sister is Princess Irene. Spending WWII in South Africa, in 1947, his uncle died, and his father succeeded to the throne, making him Crown Prince Constantine. Educated in Athens, he competed in the 1960 Rome Olympics, winning the Gold Medal in Sailing, and is an honorary member of the International Olympic Committee. In 1964, King Paul died suddenly, and he succeeded to the throne as King Constantine II of Greece. Later that year, King Constantine married 18-year old Princess Anne Marie of Denmark, his childhood sweetheart. The couple have five children and nine grandchildren. In April 1967, a group of colonels overthrew the democratic government, and established a military junta. After the King led a failed counter-coup later that year, the Royal Family were forced to flee to Rome. In 1973, a referendum abolished the Monarchy. The Royal Family moved to London. A close friend of his British Royal cousins, the King is a godfather of the Duke of Cambridge. The Duke, in turn, is a godfather of King Constantine’s eldest grandchildren, Prince Constantine Alexios, a son of Crown Prince Pavlos. King Constantine and Queen Anne Marie regularly attend Royal Events in Denmark, Spain, the UK, Sweden, and Norway, where the monarchs are their relatives. Not allowed to enter the country for many years, King Constantine and Queen Anne Marie moved back to Greece in 2012.