Letty Lynton is a 1932 American pre-Code drama film starring Joan Crawford, Robert Montgomery and Nils Asther. The film was directed by Clarence Brown and based on the 1931 novel of the same name by Marie Adelaide Belloc Lowndes; the novel is based on an historical murder allegedly committed by Madeleine Smith. Crawford plays the title character, who gets away with murder in a tale of love and blackmail.

The film has since become famous partially due to its unavailability after a 1936 court case (see § Legal status). It is remembered for the "Letty Lynton dress" designed by Adrian: a white cotton organdy gown with large ruffled sleeves, puffed at the shoulder. Macy's department store copied the dress in 1932, and it sold over 50,000 replicas nationwide.