 Louis WolheimStanislaus 'Kat' Katczinsky | Stanislaus 'Kat' Katczinsky |
 Lew AyresPaul Bäumer | Paul Bäumer |
 John WrayHimmelstoss | Himmelstoss |
 Arnold LucyKantorek | Kantorek |
 Ben AlexanderFranz Kemmerich | Franz Kemmerich |
 Scott KolkLeer | Leer |
 Owen Davis Jr.Peter | Peter |
 Walter RogersBehn | Behn |
 William BakewellAlbert Kropp | Albert Kropp |
 Russell GleasonMueller | Mueller |
 Richard AlexanderWesthus | Westhus |
 Harold GoodwinDetering | Detering |
 Slim SummervilleTjaden | Tjaden |
 G. Pat CollinsBertinck | Bertinck |
 Beryl MercerPaul's Mother | Paul's Mother |
 Edmund BreeseHerr Meyer | Herr Meyer |
 Ernie Adams2nd Medic Orderly (uncredited) | 2nd Medic Orderly (uncredited) |
 Marion Clayton AndersonAnna Bäumer (uncredited) | Anna Bäumer (uncredited) |
| PPoupée AndriotFrench Girl (uncredited) | French Girl (uncredited) |
 Vince BarnettAssistant Cook (uncredited) | Assistant Cook (uncredited) |
 Daisy BelmoreFrau Kemmerick (uncredited) | Frau Kemmerick (uncredited) |
 Glen BolesYoung Soldier (uncredited) | Young Soldier (uncredited) |
 Heinie ConklinJoseph Hammacher (uncredited) | Joseph Hammacher (uncredited) |
 Yola d'AvrilSuzanne (uncredited) | Suzanne (uncredited) |
| RRenée DamondeFrench Girl (uncredited) | French Girl (uncredited) |
 Arthur GardnerStudent (uncredited) | Student (uncredited) |
 Raymond GriffithGérard Duval (uncredited) | Gérard Duval (uncredited) |
 Ellen HallYoung Girl (uncredited) | Young Girl (uncredited) |
 William IrvingGinger - the Cook (uncredited) | Ginger - the Cook (uncredited) |
| FFrederick KohnerMinor Role (uncredited) | Minor Role (uncredited) |
