John Le Mesurier was an English actor. He is perhaps best remembered for his comedic role as Sergeant Arthur Wilson in the BBC television situation comedy Dad's Army. A self-confessed "jobbing actor", Le Mesurier appeared in more than 120 films across a range of genres, normally in smaller supporting parts.
Le Mesurier became interested in the stage as a young adult and enrolled at the Fay Compton Studio of Dramatic Art in 1933. From there he took a position in repertory theatre and made his stage debut in September 1934 at the Palladium Theatre in Edinburgh in the J. B. Priestley play Dangerous Corner. He later accepted an offer to work with Alec Guinness in a John Gielgud production of Hamlet. He first appeared on television in 1938 as Seigneur de Miolans in the BBC broadcast of The Marvellous History of St Bernard. During the Second World War Le Mesurier was posted to India, as a captain with the Royal Tank Regiment. He returned to acting and made his film debut in 1948, starring in the second feature comedy short Death in the Hand, opposite Esme Percy and Ernest Jay. He undertook a number of roles on television in 1951 including Educating Archie alongside Tony Hancock.