Klaus Kinski

as Fitzcarraldo

Claude Cardinale

as Molly

José Lewgoy

as Don Aquilino

Miguel Ángel Fuentes

as Cholo

Paul Hittscher

as Orinoco Paul

Huerequeque Enrique Bohórquez

as Huerequeque

Grande Otelo

as Station Master

Peter Berling

as Opera Manager

David Pérez Espinosa

as Campa Chief

Milton Nascimento

as Opera House Blackman

Ruy Polanah

as Rubber Baron

Salvador Godínez

as Old Missionary

Dieter Milz

as Young Missionary

William Rose

as Notary

Leoncio Bueno

Veriano Luchetti

as Opera 'Ernani' - Ernani (voice)

Costante Moret

as Opera 'Ernani' - Ernani

Dimiter Petkov

as Opera 'Ernani' - Silva

Mietta Sighele

as Opera 'Ernani' - Elvira (voice)

Lourdes Magalhães

as Opera 'Ernani' - Orchestra Pit Singer

Jean-Claude Dreyfus

as Opera 'Ernani' - Sarah Bernhardt

Isabel Jiménez de Cisneros

as Opera 'I puritani' - Doña Elvira

Liborio Simonella

as Opera 'I puritani' - Arturo

Jesus Goiri

as Opera 'I puritani' - Giorgio

Christian Mantilla

as Opera 'I puritani' - Walton