No te engañes corazón (released in English as Don't Fool Yourself Dear) is the first full-feature film of Cantinflas after becoming a star of the carpa circuit (folk theater). It was also one of the earliest films of Sara García and Carlos Orellana and the first where they share the screen. Don Boni (Orellana) is diagnosed with a deadly disease and decides to spend his last days doing good deeds. He leaves his wife and decides to help people. He then gets drunk and wakes up with a winning lottery ticket and realizes that the doctor who diagnosed him has been sent to prison for fraud.
| Actor | Role |
|---|---|
 Carlos OrellanaDon Boni | Don Boni |
 Sara GarcíaDoña Petro | Doña Petro |
| NNatalia OrtizConsuelito | Consuelito |
| EEusebio PirrínAmigo de Canti | Amigo de Canti |
 Eduardo VivasDon Gregorio (Goyo) Vidal | Don Gregorio (Goyo) Vidal |
 CantinflasCanti | Canti |
 Carmen MolinaCarmencita | Carmencita |
 Joaquín CossSeñor Rebolledo | Señor Rebolledo |
 Carlos VillatoroAlfredo | Alfredo |
| PPaco MartínezSeñor Monforte, casero (uncredited) | Señor Monforte, casero (uncredited) |
 Ismael RodríguezEmpleado oficina (uncredited) | Empleado oficina (uncredited) |
 Fanny SchillerRefugio (uncredited) | Refugio (uncredited) |
 Estanislao SchillinskyCliente restaurante (uncredited) | Cliente restaurante (uncredited) |