The Fire Within is a 1963 drama film written and directed by Louis Malle. It is based on the 1931 novel Will O' the Wisp by Pierre Drieu La Rochelle, which was inspired by the life of poet Jacques Rigaut. The film stars Maurice Ronet and features Léna Skerla, Jean-Paul Moulinot, Bernard Tiphaine, Bernard Noël, Jeanne Moreau, Jacques Sereys, and Alexandra Stewart in supporting roles. The score consists of music composed by Erik Satie and performed by pianist Claude Helffer.

Louis Marie Malle was a French film director, screenwriter, and producer who worked in both French cinema and Hollywood. Described as "eclectic" and "a filmmaker difficult to pin down", Malle made documentaries, romances, period dramas, and thrillers. He often depicted provocative or controversial subject matter.