William Alwyn CBE, born William Alwyn Smith (7 November 1905 – 11 September 1985), was an English composer, conductor, and music teacher.
William Alwyn was born in Northampton, where he showed an early interest in music and began to learn to play the piccolo. At the age of 15 he entered the Royal Academy of Music in London where he studied flute and composition. He was a virtuoso flautist and for a time was a flautist with the London Symphony Orchestra. Alwyn served as professor of composition at the Royal Academy of Music from 1926 to 1955.
William Alwyn had a remarkable range of talents. He was a distinguished polyglot, poet, and artist, as well as musician. In 1948 he became a member of the Savile Club in London. He helped found the Composers' Guild of Great Britain (now merged into the British Academy of Songwriters, Composers and Authors), and was its chairman in 1949, 1950 and 1954. He was also sometime Director of the Mechanical-Copyright Protection Society, a Vice-President of the Society for the Promotion of New Music (S.P.N.M.) and Director of the Performing Right Society. For many years he was one of the panel engaged by the BBC to read new scores to help assess whether the works should be performed and broadcast. He was appointed a CBE in 1978 in recognition of his services to music.
His compositional output was varied and large and included five symphonies, four operas, several concertos, film scores and string quartets.