Henry Fonda (Tom Joad)Jane Darwell (Ma Joad)John Carradine (Casy)Charley Grapewin (Grandpa)Dorris Bowdon (Rosasharn)Russell Simpson (Pa Joad)O.Z. Whitehead (Al)John Qualen (Muley)Eddie Quillan (Connie)Zeffie Tilbury (Grandma)Frank Sully (Noah)Frank Darien (Uncle John)Darryl Hickman (Winfield)Shirley Mills (Ruth Joad)Roger Imhof (Thomas)Grant Mitchell (Caretaker)Charles D. Brown (Wilkie)John Arledge (Davis)