Amir-Abbas Hoveyda ( Persian : امیرعباس هویدا , romanized : Amīr 'Abbās Hoveyda ; 18 February 1919 – 7 April 1979) was an Iranian economist and politician who served as Prime Minister of Iran from 27 January 1965 to 7 August 1977. He was the longest-serving prime minister in Iran's history. He also served as deputy prime minister and minister of finance in Mansur's cabinet . After the Iranian Revolution , he was tried by the newly established Revolutionary Court for "waging war against God" and spreading corruption on earth ( Mofsed-e-filarz ) and executed.