John Murphy (born 4 March 1965) is a British film composer. He is a self-taught multi-instrumental musician who began his career in the 1980s, working with The Lotus Eaters, Thomas Lang, and Claudia Brücken. He has collaborated with directors Danny Boyle, Guy Ritchie, Michael Mann, Matthew Vaughn, Stephen Frears, and James Gunn. Murphy gained recognition in the film industry while working with Guy Ritchie on his film Lock, Stock and Two