Alfred Viola (June 16, 1919 – February 21, 2007) was an American jazz guitarist who worked with Frank Sinatra for 25 years. He played the mandolin on the soundtrack of the film The Godfather. Viola grew up in an Italian family in Brooklyn and learned to play the guitar and mandolin as a teenager. He enlisted in the Army during World War II from 1942 to 1945 and played in an Army jazz band. After he was discharged in 1946, he and Page Cavanaugh, whom he had met while serving in the Army, formed a trio with bassist Lloyd Pratt. The band appeared in several films, including Romance on the High Seas with Doris Day, and played a few dates in 1946 and 1947 with Frank Sinatra. Viola continued to work with Sinatra regularly, accompanying him on several hundred studio recordings and concert dates between 1956 and 1980.