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Which is the longest serving monarch of Thailand? |
| The longest reigning monarch in the world is King Bhumibol Adulyadej, King Rama IX of the Chakri dynasty, of Thailand. He ascended to the throne on 9 June 1946, although his formal coronation did not take place until 5 May 1950. He has reigned without interruption for over 63 years. He was born on 5 December 1927. |
