"Sadudee Maharacha" or "Hymn to the Great King" alternatively known as "the Bhumibol Hymn" is a Thai royalist song written by Charlie Intharawijit, Saman Kanjanaphlin and Surat Phukkawet to honour King Bhumibol the Great and Queen Sirikit. For the film "Lom Nao" by Charin Nantanakorn, starring Mitr Chaibancha, Petcha Chaowarat and Aranya Namwong in 1966.

Later, this song was sung to pay tribute to King Bhumibol Adulyadej the Great and Queen Sirikit. On the occasion of the birthday of both of them always It is common practice that this song must be sung after the anthem. and a candle was lit to offer blessings

The government has classified this song as 1 of the 6 important songs of the country. According to the Cabinet resolution dated December 30, 2003

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