| Person | Type | Job | Role(s) |
|---|---|---|---|
 Darius Milhaud | Crew | Sound | Music |
 Nicole Védrès | Crew | Directing | Director, Writer |
André Gide | Cast | Actor | Self |
 Charlie Chaplin | Cast | Actor | Self (archive footage) |
Darius Milhaud | Cast | Actor | Self |
 Franklin D. Roosevelt | Cast | Actor | Self (archive footage) |
 George Bernard Shaw | Cast | Actor | Self (archive footage) |
 Jacques Prévert | Cast | Actor | Self (uncredited) |
 Jean Cau | Cast | Actor | Self - Sartre's secretary (uncredited) |
 Jean-Paul Sartre | Cast | Actor | Self |
 Jean-Pierre Aumont | Cast | Actor | The Man of Today |
 Joseph Stalin | Cast | Actor | Self (archive footage) |
 Charles-Édouard Jeanneret-Gris | Cast | Actor | Self |
 Pablo Picasso | Cast | Actor | Self |
 Marie Curie | Cast | Actress | Self (archive footage) |
 Albert Einstein | Cast | Actor | Self (archive footage) |
André Labarthe | Cast | Self | |
Irène Joliot-Curie | Cast | Self (archive footage) | |
Jean Rostand | Cast | Self | |
Daniel Lagache | Cast | Self | |
 Frédéric Joliot-Curie | Cast | Self | |
Marcel Petiot | Cast | Self (archive footage) | |
Charles-Édouard Jeanneret-Gris | Cast | Self | |
 Françoise Gilot | Cast | Actress | Self - Picasso's companion (uncredited) |
| Person | Type | Job | Role(s) |
