Langdon's film debut came in "The Great Impostor" (1961), starring Tony Curtis. Langdon went on to have leading roles in films such as "The Rounders" (1965), "Hold On!" (1966), "A Guide for the Married Man" (1967), "A Man Called Dagger" (1967), "The Cheyenne Social Club" (1970), and "A Fine Madness" (1966) which led to her posing nude for "Playboy" magazine. In 1966, United Artists Pictures released "Frankie and Johnny" in which Langdon co-starred along with Elvis Presley, Donna Douglas and Harry Morgan. Her later films included "The Evictors" (1979), "Without Warning" (1980), "Zapped!" (1982), "UHF" (1989) and "Zapped Again!" (1990).