Simon Jeffes (Crawley, UK, 19 February 1949 – 11 December 1997) was an English classically trained guitarist, composer and arranger. He formed, and was the core performer of, the Penguin Cafe Orchestra. He composed the ballet Still Life at the Penguin Cafe. According to Robert Sandall, on the official Penguin Cafe Orchestra website, Jeffes died of an inoperable brain tumor in December 1997.