The Secret Witness
- Taon: 1931
- Bansa: United States of America
- Genre: Drama, Comedy, Mystery
- Studio: Famous Attractions
- Keyword: adultery, based on novel or book, murder
- Direktor: Thornton Freeland
- Cast: Una Merkel, Purnell Pratt, Zasu Pitts, Clarence Muse, Paul Hurst, Ralf Harolde