Cantinflas and three friends return a stolen necklace to an actress who invites them to be extras at Clasa studios. While on the set, he falls asleep and dreams that he is d'Artagnan, fighting on behalf of Queen Anne.

Cantinflas
as Cantinflas / D'Artagnan (as Mario Moreno 'Cantinflas')

Ángel Garasa
as Ricardo / Cardenal Richelieu

Janet Alcoriza
as Mimí / Milady (as Raquel Rojas)

Consuelo Frank
as Reina / Ana de Austria

Pituka de Foronda
as Constancia / Sra. Bonacieux

Andrés Soler
as Athos

Julio Villarreal
as Rey Luis XIII

Jorge Reyes
as Julio / Duque de Buckingham

José Elías Moreno
as Portos

Rafael Icardo
as Comisario / Sr. de Treville