Simeon Borisov Saxe-Coburg-Gotha (Bulgarian: Симеон Борисов Сакскобургготски, (transliteration: Simeon Borisov Sakskoburggotski) or Цар Симеон II (Tsar Simeon II); German: Simeon von Sachsen-Coburg und Gotha or Simeon von Wettin; Italian: Simeone di Sassonia-Coburgo-Gotha; born 16 June 1937) is the last reigning Bulgarian monarch and later served as Prime Minister of Bulgaria from 2001 to 2005.

During his reign as Simeon II, King (or Tsar) of Bulgaria, from 1943 to 1946 he was a minor, the royal authority being exercised over the kingdom on his behalf by a regency. The regents were 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. He returned to his home country in 1996 and formed the political party National Movement for Stability and Progress (NMSP) and became Prime Minister of the Republic of Bulgaria from July 2001 until August 2005. In the next elections he, as a leader of NMSP, took part in a coalition government with the ex-communist party BSP, and in 2009 after NMSP failed to win any seats in the Parliament, he left politics.

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