I Saw What You Did
- Taon: 1965
- Bansa: United States of America
- Genre: Thriller
- Studio: William Castle Productions, Universal Pictures
- Keyword: based on novel or book, slumber party, murder, neighbor, prank telephone call, hagsploitation
- Direktor: William Castle
- Cast: Andi Garrett, Sara Lane, Joan Crawford, John Ireland, Leif Erickson, Sharyl Locke