The Mysterious Lady
- Ano: 1928
- País: United States of America
- Xénero: Adventure, Drama
- Estudo: Metro-Goldwyn-Mayer
- Palabra clave: silent film, russian spy, austrian officer, ploy
- Director: Fred Niblo
- Reparto: Greta Garbo, Conrad Nagel, Gustav von Seyffertitz, Albert Pollet, Edward Connelly, Richard Alexander