Sacha GuitryLouis Pasteur / Regista / Sceneggiatore Maurice SchutzGrandfather Armand LurvilleThe first witness Camille CousinThe second witness Henry BonvalletSadi Carnot, President of the Republic Gaston DuboscPresident of the Academy of Medicine François RodonLittle Joseph Meister Pierre HuchetServant (uncredited) Camille BeuveJoseph Lister (uncredited) Julien BertheauStudent (uncredited) Gaston AllainStudent (uncredited) Félix ClémentStudent (uncredited) Jean FranceyStudent (uncredited) Pierre MondaLittle boy (uncredited) Charles VissièresFrémy, old doctor (uncredited) Sacha GuitryLouis Pasteur / Regista / Sceneggiatore Jean BacheletDirector Of Photography Louis BeydtsCompositore Musicale Originale 
