Phyllis Dietrichson is a fictional character from the classic film noir movie "Double Indemnity," directed by Billy Wilder in 1944. She is portrayed by actress Barbara Stanwyck and is known for her cunning and seductive nature. Phyllis is a housewife who conspires to murder her husband to collect on his life insurance policy, showcasing her manipulative and ruthless personality. In the film, Phyllis forms a partnership with an insurance salesman named Walter Neff, played by Fred MacMurray. Their illicit affair and criminal plot drive the story, highlighting themes of greed, betrayal, and moral ambiguity. Phyllis Dietrichson remains an iconic figure in film history, representing the archetype of the femme fatale.