BUtterfield 8 is a 1960 American drama film directed by Daniel Mann, starring Elizabeth Taylor and Laurence Harvey. Taylor won her first Academy Award for her performance in a leading role. The film was based on a 1935 novel of the same name by John O'Hara.

Gloria Wandrous wakes up in the apartment of wealthy executive Weston Liggett, and finds that he has left her $250. Insulted, she finds her dress was torn, and takes Liggett's wife Emily's mink coat to cover herself, scrawling "No Sale" in lipstick on the mirror. She orders her telephone answering service, BUtterfield 8, to put Liggett through if he calls.

Gloria visits a childhood friend, pianist Steve Carpenter, who chastises her for wasting her life on one-night stands, but agrees to ask his girlfriend Norma to lend her a dress. Norma later tells Steve he must choose between Gloria and her.

Liggett takes a train to the countryside, where his wife Emily is caring for her mother. His friend, Bingham Smith, advises him to end his adulterous relationships and return to Bing's law firm, instead of working for his father-in-law's chemical business. Meanwhile, Gloria lies to her mother Annie, claiming to have spent the night at Norma's.

Liggett returns home. Finding the lipstick and money, he phones Gloria to explain the money was meant for her to buy a new dress, to replace the one that he had torn. While drinking later that night, Liggett advises her to ask a high price for her lovemaking talents. She insists she does not take payment from her dates, and claims she has been hired as a model to advertise the dress she is wearing at three bistros that night. Liggett follows Gloria, watching her flirt with various men at several clubs. He drives her to a run-down motel. After sleeping together, Liggett and Gloria decide to explore their relationship further. They spend five days together, eventually falling in love with one another. They part only after Liggett's wife Emily returns.

Returning home, Gloria confesses to her mother about having been the "slut of all time", but declares that that is all over now, since she is truly in love. Gloria visits her psychiatrist, Dr. Tredman, to insist that her relationship with Liggett has cured her of promiscuity.

For his part, Liggett also plans to change his life, taking up Bing's offer of a job at the law firm. When he returns home, Emily has noticed that her mink is gone. Liggett makes excuses and rushes out to search for Gloria at her regular clubs. He cannot locate her, but in his search, he is repeatedly confronted with the reality of Gloria's promiscuous past. When Gloria finds Liggett at a bistro the following evening, he drunkenly launches into insults. Gloria drives Liggett to his apartment building where Emily, spotting them from a window, watches as her husband throws the coat at Gloria, saying he would never give the tainted object back to his wife.

Heartbroken, Gloria goes to Steve, saying that she feels she has "earned" the mink coat she is wearing. Having never before taken payment from the men she slept with, she now has and laments "what that makes me". She recounts that when she was 13, a friend of her widowed mother, Major Hartley, taught her about "evil". She hates herself because she loved it and thus went on to make her life out of it. Steve insists that Gloria stay the night, since both Gloria and he have to decide what to do next. Norma arrives the next morning, finding Gloria asleep on Steve's couch; having at last made up his mind, he asks Norma to marry him.