Hassanal Bolkiah Muiz'zaddin Wad'daulah (born 15 July 1946) is Sultan of Brunei, reigning since 1967, and has also served as Prime Minister of Brunei since its independence from the British rule in 1984. He is among the world's few remaining absolute monarchs.
The eldest son of Sultan Omar Ali Saifuddien III and Raja Isteri Pengiran Anak Damit, he is the 29th sultan to ascend to the Bruneian throne, following the abdication of his father in 1967. The Sultan has been ranked among the wealthiest individuals in the world. As of 2023, Hassanal Bolkiah is said to have a net worth of $50 billion. He is the world's longest-reigning current monarch and the longest-serving current head of state. On 5 October 2017, Bolkiah celebrated his Golden Jubilee to mark the 50th year of his reign.