The 79-year-old - now the world's longest-reigning living monarch - became the ninth king of the Chakri Dynasty in June 1946.
Royals from nearly 30 countries around the world have accepted Thailand's invitation to celebrate his Diamond Jubilee on June 12-13.
They include Malaysia, Japan, Luxemburg and Sweden. Other countries, including Denmark, Spain, Morocco, Tonga, Bhutan, the Netherlands, Norway, Belgium and the United Kingdom have confirmed that royal spouses, crown princes or other members of the royal families will participate in the celebrations."
DID You Know????
King Bhumibol is an accomplished jazz musician and composer. He was awarded honorary membership of the Vienna Institute of Music and Arts at the age of 32. He used to play jazz music on air on the Or Sor radio station earlier in his reign. His songs can often be heard at social gatherings and are performed in concerts.
Listen and Download The Musical Compositions of His Majesty King Bhumibol Adulyadej . Here