Bhumibol Adulyadej (Thai: ภูมิพลอดุลยเดช; RTGS: Phumiphon Adunyadet; pronounced [pʰūː.mí.pʰōn ʔà.dūn.já.dèːt] ( listen); see full title below; born 5 December 1927) is the King of Thailand. He is also known as Rama IX, as he is the ninth monarch of the Chakri Dynasty. Having reigned since 9 June 1946, he is the world's longest-serving current head of state and the longest-reigning monarch in Thai history, serving for 68 years, 172 days.[1]