Sir William Turner Walton OM (29 March 1902 – 8 March 1983) was an English composer. During a sixty-year career, he wrote music in several classical genres and styles, from film scores to opera. His best-known works include Façade, the cantata Belshazzar's Feast, the Viola Concerto and the First Symphony. Walton was a slow worker, painstakingly perfectionist, and his complete body of work across his long career is not large. His most popular compositions continue to be frequently performed in the twenty-first century, and by 2010 almost all his works had been released on CD.