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Libertad Lamarque as Sor Lucero / Hermana María de la Luz |
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César Costa as Mario |
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Angélica María as Marisa |
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Luz Márquez as Mamá de Mario |
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Fernando Luján as Greñas |
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Andrea Palma as Hermana Margarita |
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Antonio Raxel as Papá de Mario |
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Fanny Cano as Amiga de Marisa |
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Nacho Méndez as uncredited |
| Directing | Alfonso Corona Blake | Director |
| Writing | Julio Alejandro | Writer |
| Art | José Rodríguez Granada | Production Design |
| Editing | José W. Bustos | Editor |
| Writing | Fernando Galiana | Writer |
| Camera | Hugo Velasco | Camera Operator |
| Camera | Agustín Martínez Solares | Director of Photography |
| Sound | Raúl Lavista | Music |
| Production | Óscar J. Brooks | Producer |
