A Letter to Three Wives is a 1949 American romantic drama film which tells the story of a woman who mails a letter to three women, telling them she has left town with the husband of one of them. It stars Jeanne Crain, Linda Darnell, Ann Sothern, Kirk Douglas, Paul Douglas in his film debut, Jeffrey Lynn, and Thelma Ritter. An uncredited Celeste Holm provides the voice of Addie Ross, the unseen woman who wrote the titular letter. Wikipedia
Mrs. Finney: Can't we have peace in this house even on New Year's Eve? Sadie: You got it mixed up with Christmas. New Year's Eve is when people go back to killing each other.