Marc Behm (12 January 1925 in Trenton, New Jersey – 12 July 2007 in Fort-Mahon-Plage, France) was an American novelist, actor and screenwriter, who lived as an expatriate in France. Behm wrote the script for The Beatles' Help! (1965) and the film Charade (1963). His best and most well-known literary work is the surreal love story cum hard-boiled crime novel Eye of the Beholder (1980).
Behm developed a fascination for French culture while serving in the US army during World War II; later, he appeared as an actor on several French television programmes, before moving there permanently.