Old Cardinal
Peter Brocco
Street Singer
Stephen Brown
Cardinal Barberini (Later Pope Urban VIII)
Hugo Haas
Virginia Galilei
Frances Heflin
Galileo Galilei
Charles Laughton
Mrs. Sarti
Eda Reiss Merin
Andrea Sarti (as Bill Phipps)
William Phipps
Music
Hanns Eisler
Director
Joseph Losey
Writer
Art Direction
John Hubley
Bertolt Brecht
Ruth Berlau
Casper Neher
Choreographer
Lotte Goslar
Still Photographer
Wardrobe Supervisor
Robert Davison
Production Design
Helene Weigel