Former Governor of River State  Alfred Papapreye Diete-Spiff was 24 years old when he became Governor of Rivers State. He remains the youngest Governor in Nigerian history at 24 years, 9 months and 29 days. Alfred Papapreye Diete-Spiff- Gov. River State -1967 -1975 Diete-Spiff held office for 8 years, from May 27, 1967, until July 30, 1975 (the day he clocked 33 years of age).  Source: #HistoryVille