Who Killed Mary Whats'ername?
- År: 1971
- Land: United States of America
- Genre: Kriminalitet, Mysterium, Thriller
- Studio: The Cannon Group
- Nøgleord: murder of a prostitute
- Direktør: Ernest Pintoff
- Cast: Red Buttons, Sylvia Miles, Alice Playten, Conrad Bain, Dick Anthony Williams, Sam Waterston