Kronprins Frederik is the eldest son of the current queen: Dronning Margrete who will become the king after her. His birthday is on May 26th and this year he became 50 years old. He was born at the Rigshospitalet in Copenhagen, such as Princess Margrethe (the current queen Margrethe) and Prince Henrik's first child. He should have been born in Amalienborg, but due to complications, it ended with an acute emperor section on the Kingdom.The Crown Prince is Frederik André Henrik Christian. André after his grandfather, Andre de Laborde de Monpezat, Henrik after his father, Prince Henrik and Christian after his grandfather, King Christian d. 10.Frederik and Mary (his wife) have four children: Prince Christian at 12, Princess Isabella at 11 and Twins, Prince Vincent and Princess Josephine at seven years.