The Mystery Girl
- Blwyddyn: 1918
- Gwlad: United States of America
- Genre: Crime, Drama
- Stiwdio: Famous Players-Lasky Corporation
- Allweddair:
- Cyfarwyddwr: William C. de Mille
- Cast: Ethel Clayton, Henry Woodward, Clarence Burton, Charles West, Winter Hall, Mayme Kelso
