El Portero

Cantinflas

as Cantinflas

Silvia Pinal

as Rosita

Carlos Martínez Baena

as Don Sebastian, el profe

Óscar Pulido

as Elpidio

Fernando Casanova

as Raúl

José Baviera

as Dr. Perfecto Lozano

Josefina del Mar

as La vecina bailarina

Conchita Gentil Arcos

as Doña Cuca, vecina

Pepe Martínez

as Profesor examinador

Pedro Elviro

as Don Fortino

Ricardo Adalid

as Amigo de Raúl en fiesta (uncredited)

Felipe de Flores

as Amigo de Raúl en fiesta (uncredited)

Stephen Berne

as Masajista (uncredited)

Victorio Blanco

as Hombre en velorio (uncredited)

Rodolfo Calvo

as Hombre en velorio (uncredited)

Carmen Cabrera

as Miembra del patronato (uncredited)

María Valdealde

as Miembra del patronato (uncredited)

Paco Martínez

as Miembro del patronato (uncredited)

Félix Samper

as Miembro del patronato (uncredited)

Jaime Calpe

as Estudiante inteligente (uncredited)

José Luis Moreno

as Estudiante (uncredited)

Ismael Pérez 'Poncianito'

as Estudiante (uncredited)

Jorge Pérez

as Estudiante (uncredited)

Lupe Carriles

as Vecina chismosa (uncredited)

María Gentil Arcos

as Vecina chismosa (uncredited)

Lupe del Castillo

as Vecina (uncredited)

Regino Herrera

as Vecino (uncredited)

Enrique Carrillo

as El tarzán, vecino pachuco (uncredited)

Jorge Chesterking

as John, amigo de Perfecto (uncredited)

Edmundo Espino

as Esposo de Guadalupe (uncredited)

Elodia Hernández

as Doña Guadalupe (uncredited)

Rafael Icardo

as Secretario (uncredited)

José Pardavé

as Lechero (uncredited)

Salvador Quiroz

as Empleado carrera caballos (uncredited)

Humberto Rodríguez

as Empleado secretaria (uncredited)

Jaime Jiménez Pons

as Estudiante (uncredited)