The film refers to the romance between a young mechanic of humble working background and a university student from a well-to-do family of professionals who face the difficulties originated in their different social origins.
| Actor | Role |
|---|---|
 María Aurelia BisuttiMaría/Mariquita | María/Mariquita |
 Emilio AlfaroJosé | José |
 Luis Medina CastroMario | Mario |
 Menchu QuesadaMadre de María | Madre de María |
| JJorge LarreaPadre de María | Padre de María |
 Pedro BuchardoPadre de José | Padre de José |
 Susana MayoNot listed | Not listed |
 María Cristina LaurenzElisa | Elisa |
| BBlanca TapiaMadre de José | Madre de José |
 Fernando «Tacholas» IglesiasMozo | Mozo |
| JJulio C. QuinoNot listed | Not listed |
 Hugo CapreraProfesor | Profesor |
| AAlfredo TobaresNot listed | Not listed |
| BBettina HudsonNot listed | Not listed |
| JJeanette SouláNot listed | Not listed |
| CCarlos BorisNot listed | Not listed |
| OOmar CerruttiNot listed | Not listed |
 Frank NelsonNot listed | Not listed |