USA
Sylvia West is a young poetess engaged to Frederic Summers, an eccentric millionaire. Summers, a man who always fears he is being loved for his money, decides to make a small check on his prospective bride. The results of this check completely shock him. Not one fact matches 'his' Sylvia. Intregued and bewildered, Summers hires detective Alan Maklin and has him make a thorough investigation on 'Who Is Sylvia.' - IMDb
| La doppia vita di Sylvia West |  Italy |
| L'enquête |  France |
| I gynaika tou pezodromiou (transliterated title) |  Greece |
| Silvia |  Brazil |
| Silvia |  Spain |
| Silvia |  Romania |
| Sylvia |  Austria |
| Sylvia |  Finland |
| Sylvia |  United Kingdom |
| Sylvia | USA |
| Sylvia |  West Germany |
| Vem var Sylvia? |  Sweden |
| Das Vorleben der Sylvia West | Austria |
| Das Vorleben der Sylvia West | West Germany |
| Η γυναίκα του πεζοδρομίου | Greece |
| Сильвия |  Russia |
 |
Manuel Padilla Jr. [9] | Pancho |
 |
Ricky Allen | Boy in Library |
