Donald Walbridge Shirley (January 29, 1927 – April 6, 2013) was an American jazz pianist and composer. He recorded many albums for Cadence during the 1950s and 1960s, experimenting with jazz with a classical influence. He wrote organ symphonies, piano concerti, a cello concerto, three string quartets, a one-act opera, works for organ, piano and violin, a symphonic tone poem based on the novel Finnegans Wake by James Joyce, and a set of "Variations" on the legend of Orpheus in the Underworld. During the 1960s, Shirley went on a number of concert tours, some in Deep South states, hiring New York-nightclub bouncer Tony "Lip" Vallelonga as his driver and bodyguard. Their story is dramatized in the 2018 film Green Book.