Himself (President of Spain)
Manuel Azaña
Himself (Parliamentarian)
José Díaz
Herself
Dolores Ibárruri
Himself (Republican Army)
Enrique Lister
Commander Martinez de Aragón
Himself (German writer)
Gustav Regler
Narrator (voice)
Orson Welles
Ernest Hemingway
Jean Renoir
Writer
Editor
Helen van Dongen
Joris Ivens
Director
Director of Photography
John Fernhout
Prudencio de Pereda
John Dos Passos
Archibald Macleish
Lillian Hellman
Music
Virgil Thomson
Music Arranger
Marc Blitzstein