Bhumibol Adulyadej; born 5 December 1927 is the reigning King of Thailand. He is known as Rama IX. 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.
Bhumibol was crowned King of Thailand on 5 May 1950 at the Royal Palace in Bangkok where he pledged that he would "reign with righteousness for the benefit and happiness of the Siamese people" ("เราจะครองแผ่นดินโดยธรรม เพื่อประโยชน์สุขแห่งมหาชนชาวสยาม").[23] Notable elements associated with the coronation included the Bahadrabith Throne beneath the Great White Umbrella of State; and he was presented with the royal regalia and utensils.