Louis Wolheim
as Stanislas 'Kat' Katczinsky

Lew Ayres
as Paul Bäumer

John Wray
as Himmelstoss

Arnold Lucy
as Kantorek

Ben Alexander
as Franz Kemmerich

Scott Kolk
as Leer

Owen Davis Jr.
as Peter

Walter Rogers
as Behn

William Bakewell
as Albert Kropp

Russell Gleason
as Mueller

Richard Alexander
as Westhus

Harold Goodwin
as Detering

Slim Summerville
as Tjaden

G. Pat Collins
as Bertinck

Beryl Mercer
as Paul's Mother

Edmund Breese
as Herr Meyer

Ernie Adams
as 2nd Medic Orderly (uncredited)

Marion Clayton Anderson
as Anna Bäumer (uncredited)

Poupée Andriot
as French Girl (uncredited)

Vince Barnett
as Assistant Cook (uncredited)

Daisy Belmore
as Frau Kemmerick (uncredited)

Glen Boles
as Young Soldier (uncredited)

Heinie Conklin
as Joseph Hammacher (uncredited)

Yola d'Avril
as Suzanne (uncredited)

Renée Damonde
as French Girl (uncredited)

Arthur Gardner
as Student (uncredited)

Raymond Griffith
as Gérard Duval (uncredited)

Ellen Hall
as Young Girl (uncredited)

William Irving
as Ginger - the Cook (uncredited)

Frederick Kohner
as Minor Role (uncredited)

Frank Leichtfried
as Minor Role (uncredited)

Tom London
as 1st Medic Orderly (uncredited)

Bertha Mann
as Sister Libertine (uncredited)

Joan Marsh
as Poster Girl (uncredited)

Edwin Maxwell
as Herr Bäumer (uncredited)

Jack McHugh
as Schoolboy (uncredited)

Maurice Murphy
as Soldier (uncredited)

Robert Parrish
as Schoolboy (uncredited)

Bodil Rosing
as Mother of Hospital Patient (uncredited)

Wolfgang Staudte
as Minor Role (uncredited)

Jack Sutherland
as Minor Role (uncredited)

David Tyrell
as Soldier (uncredited)

Dorothy Vernon
as Charwoman (uncredited)

Fred Zinnemann
as German Soldier / French Ambulance Driver (uncredited)