The House of Wangchuck (Tibetan: དབང་ཕྱུག་རྒྱལ་བརྒྱུད་, Wylie: Dbang-phyug Rgyal-brgyud) has ruled Bhutan since it was reunified in 1907. Prior to reunification, the Wangchuck family had governed the district of Trongsa as descendants of Dungkar Choji. They eventually overpowered other regional lords and earned the favour of the British Empire. After consolidating power, Penlop of Trongsa Sir Ugyen Wangchuck was elected hereditary King of Bhutan, or Druk Gyalpo ("Dragon King"), thus founding the royal house.
The Wangchuck dynasty centralized government power in Bhutan and established relations with the British Empire and India under its first two monarchs. The third, fourth, and fifth (current) monarchs have put the kingdom on its path toward democratization, decentralization, and development.
Jigme Singye Wangchuck (born 11 November 1955) is the former King of Bhutan. He was the fourth Dragon King (Druk Gyalpo) of Bhutan from 1972 until his abdication in favour of his eldest son, Jigme Khesar Namgyel Wangchuck, in 2006. He is credited with many modern reforms in the country.