His Majesty The King
The monarchy of Thailand (whose monarch is referred to as the King of Thailand or historically as King of Siam; Thai: พระมหากษัตริย์ไทย), refers to the constitutional monarchy and monarch of the Kingdom of Thailand (formerly Siam). The King of Thailand is the head of state and head of the ruling Royal House of Chakri.
The current monarch of Thailand is Bhumibol Adulyadej. The king has reigned since the death of his older brother Ananda Mahidol on 9 June 1946, making him the world's longest reigning current monarch and the world's longest serving head of state. King Bhumibol is not just a symbolic figurehead but possesses some powers, such as being the prerogative of royal assent and the power of pardon. King Bhumibol is loved and revered by most Thai people and is protected by lèse majesty laws.The King of Thailand's titles include Head of State, Head of the Armed Forces, Adherent of Buddhism, and Upholder of religions.