The French Lieutenant's Woman is a 1981 British romantic drama film directed by Karel Reisz, produced by Leon Clore, and adapted by the playwright Harold Pinter. It is based on The French Lieutenant's Woman, a 1969 novel by John Fowles. The music score is by Carl Davis and the cinematography by Freddie Francis.

Karel Reisz was a Czech-born British filmmaker and film critic, one of the pioneers of the new realist strain in British cinema during the 1950s and 1960s. Two of the best-known films he directed are Saturday Night and Sunday Morning (1960), a classic of kitchen sink realism, and the romantic period drama The French Lieutenant's Woman (1981).