The Mystery of Mr. X
- Yil: 1934
- Mamlakat: United States of America
- Janr: Comedy, Crime, Mystery
- Studiya: Metro-Goldwyn-Mayer
- Kalit so'z: diamond, jewel thief, pre-code
- Direktor: Edgar Selwyn
- Cast: Robert Montgomery, Elizabeth Allan, Lewis Stone, Ralph Forbes, Henry Stephenson, Forrester Harvey