Unmarried opera singer has a baby, and her friends convince her to pass it off as the grandchild of a wealthy old lady.
| Directing | Juan Bustillo Oro | Director |
| Writing | Juan Bustillo Oro | Writer |
| Production | Rafael Pérez Grovas | Producer |
| Sound | Manuel Esperón | Music |
| Sound | Salvador Ochoa | Music |
| Crew | Jorge Stahl Jr. | Cinematography |
| Editing | Gloria Schoemann | Editor |
| Art | Manuel Fontanals | Production Design |
| Art | Carlos Arjona | Set Decoration |
| Costume & Make-Up | Bertha Mendoza López | Costume Design |
| Costume & Make-Up | Vicente Tostado | Costume Design |