William Martin Green (22 April 1899 – 8 February 1975), known by his stage name, Martyn Green, was an English actor and singer. He is remembered for his performances and recordings as principal comedian of the D'Oyly Carte Opera Company, in the leading patter roles of the Gilbert & Sullivan comic operas in the 1930s and 1940s, and for his career in America from the 1950s to the 1970s.