Antonio Torres, a serious singer of Spanish popular music, and Bárbara, a vivacious yé-yé singer, face off in a chaotic contest promoted by Rodolfo Sicilia, an overworked publicist.

Concha Velasco
as Bárbara

Manolo Escobar
as Antonio Torres

Alfredo Landa
as Rodolfo Sicilia

Gracita Morales
as Rosarito

Antonio Ferrandis
as Braulio

Joaquín Prat
as Contest Announcer

José María Caffarel
as Gosálvez

Tomás Blanco
as Police Commissioner

Emiliano Redondo
as Michel

Manuel Velasco
as Carlos