List of Famous people born on April 21st

Raymond Frederick "Ray" Streater is a British physicist, and professor emeritus of Applied Mathematics at King's College London. He is best known for co-authoring a text on quantum field theory, the 1964 PCT, Spin and Statistics and All That.

Edwin Stanton Porter was an American film pioneer, most famous as a producer, director, studio manager and cinematographer with the Edison Manufacturing Company and the Famous Players Film Company. Of over 250 films created by Porter, his most important include Jack and the Beanstalk (1902), Life of an American Fireman (1903), The Great Train Robbery (1903), The Kleptomaniac (1905), Life of a Cowboy (1906), Rescued from an Eagle's Nest (1908), and The Prisoner of Zenda (1913).

Edoardo Leo is an Italian actor, director and screenwriter.

Francesca D'Aloja is an Italian film, television and stage actress.

Marcel Hendrickx was a Belgian racing cyclist. He rode in the 1949 Tour de France.

Philippe Boënnec was a member of the National Assembly of France. He represented Loire-Atlantique's 9th constituency from 2007 to 2012 as a member of the Union for a Popular Movement.