| Actor | Role |
|---|---|
 Henri VidonPope Pius X | Pope Pius X |
 Isa MirandaCountess | Countess |
 Tullio CarminatiCardinal Merry del Val | Cardinal Merry del Val |
 Miranda CampaThe Pope's Mother | The Pope's Mother |
 Giannina ChiantoniThe Pope's first sister | The Pope's first sister |
 Antonio CentaThe Pope's Secretary | The Pope's Secretary |
 Armando MigliariThe doctor | The doctor |
 Mario Mazzacardinal Mariano Rampolla | cardinal Mariano Rampolla |