From Wikipedia, the free encyclopedia John Le Mesurier (born John Elton Le Mesurier Halliley, 5 April 1912 – 15 November 1983) was a BAFTA Award-winning English actor. He is most famous for his role as Sergeant Arthur Wilson in the popular 1970s BBC comedy Dad's Army. Description above from the Wikipedia article John Le Mesurier, licensed under CC-BY-SA, full list of contributors on Wikipedia.