| Madame X | |
| Director: | Orestis Laskos |
| Starring: | Cybele Vana Filippidou |
| Cinematography: | Dinos Katsouridis |
| Editing: | Dinos Katsouridis |
| Runtime: | 109 minutes |
| Country: | Greece |
| Language: | Greek |
Madame X (Greek title I Agnostos) is a 1956 Greek drama film directed by Orestis Laskos. It is based on the 1908 play Madame X by French playwright Alexandre Bisson (1848-1912).
A woman is thrown out of her home by her jealous husband and sinks into depravity. Twenty years later, she finds herself accused of murder for saving her son, who does not know who she is. He finds himself defending her without knowing her background.