Became referred to as the Crown Prince of Denmark and heir towards the throne while the eldest child of Queen Margrethe II and Henrik, the Prince Consort. He was called Frederik after his maternal grandfather, Ruler Frederick IX within Danish Royal custom. He had a qualification in political technology from Aarhus University or college. He wedded Mary Donaldson in 2004 and she became the Princess of Denmark. They possess four kids. His mom and Queen Elizabeth II became two from the longest-reigning queens ever sold.