Simeon Saxe-Coburg-Gotha (born 16 June 1937; German: Simeon von Sachsen-Coburg und Gotha; Spanish: Simeón de Sajonia-Coburgo-Gotha) or Simeon Borisov Sakskoburggotski (Bulgarian: ?????? ??????? ????????????????), known formerly or by courtesy as Tsar Simeon II (Bulgarian: ??? ?????? II), was the last reigning Tsar of Bulgaria from 1943 to 1946, before later serving as Prime Minister of Bulgaria from 2001 to 2005.
During his reign as Simeon II, Tsar of Bulgaria, he was a minor, with royal authority being exercised over the tsardom on his behalf by a regency led by Simeon's uncle Prince Kiril, General Nikola Mihov and the prime minister, Bogdan Filov.
In 1946 the monarchy was abolished as a consequence of a referendum, and Simeon was forced into exile in Spain.
He returned to his home country in 1996, formed the political party National Movement for Stability and Progress (NMSP) and was elected Prime Minister of the Republic of Bulgaria from July 2001 until August 2005.
In the next elections, as a leader of NMSP, he took part in a coalition government with the ex-communist party BSP.
In 2009, after NMSP failed to win any seats in Parliament, he left politics.
Simeon is one of the two remaining living heads of state from the time of World War II (the other is Tenzin Gyatso, 14th Dalai Lama of Tibet), the only living person who has borne the title "Tsar", and one of only two former monarchs in history to have become head of government through democratic elections (the other is the now-deceased Norodom Sihanouk of Cambodia).