Kanjeng Gusti Pangeran Adipati Arya Mangkunagara VIII (born in Kartasura, 7 April 1925; died in Surakarta, 2 August 1987 at the age of 62 years; came to power in 1944) was the last ruler of Mangkunegaran, in Java, in modern Indonesia. He experienced the Dutch colonial period and the beginning of Indonesia's independence. Mangkunegara VIII was the son of Mangkunegara VII, by Gusti Raden Ayu Retnaningrum, one of his secondary wives. The queen consort Gusti Kanjeng Ratu Timur had only one child, a daughter named Gusti Raden Ayu Siti Nurul Kusumawardhani.