Former President of the European Parliament (1964-1965)
Member State: Belgium
Political Party: Christian Social Party, Walloon Rally, Democratic Front of the Francophones
Date of birth: 10 April 1900
Died: 10 October 1977

Duvieusart  was a Belgian politician who served as Minister of Finance. He was the Belgian Prime Minister for two months in 1950.  He was later the President of the political parties Walloon Rally and the Democratic Front of the Francophones.