Rock Hudson as Lt. Frederick Henry

Jennifer Jones as Catherine Barkley

Vittorio De Sica as Major Rinaldi

Luigi Barzini as Court Martial Colonel

Georges Brehat as Captain Bassi

Oskar Homolka as Dr. Emerich

Mercedes McCambridge as Mrs. Van Campen

Elaine Stritch as Helen Ferguson

Kurt Kasznar as Bonello

Victor Francen as Colonel Valentini

Alberto Sordi as Père Galli

Leopoldo Trieste as Passini

Franco Interlenghi as Ayrno

Bud Spencer as Carabinieri

Eduard Linkers as Lieutenant Zimmermann

Johanna Hofer as Mrs. Zimmermann

Eva Kotthaus as Nurse