John Ford Director Henry Fonda Tom Joad Actor Jane Darwell Ma Joad Actor John Carradine Casy Actor Charley Grapewin Grandpa Actor Dorris Bowdon Rosasharn Actor Russell Simpson Pa Joad Actor O.Z. Whitehead Al Actor John Qualen Muley Actor Eddie Quillan Connie Actor Zeffie Tilbury Grandma Actor Frank Sully Noah Actor Frank Darien Uncle John Joad Actor Darryl Hickman Winfield Joad Actor Shirley Mills Ruthie Joad Actor Grant Mitchell Manager of government camp Actor Ward Bond Friendly policeman in Bakersfield Actor Frank Faylen Tim Wallace, camp commiteeman Actor Joe Sawyer Bookkeeper Actor Harry Tyler Bert, diner cook Actor Charles Middleton Leader Actor John Arledge Davis, bulldozer driver Actor Hollis Jewell Muley's son Actor Paul Guilfoyle Floyd, agitator Actor Charles D. Brown Wilkie, boy lookout at dance Actor Roger Imhof Mr. Thomas, ditch employer Actor Nunnally Johnson Screenwriter Darryl F Zanuck Producer Gregg Toland Cinematographer Robert L. Simpson Film Editing Richard Day Art Director Mark-Lee Kirk Art Director Thomas Little Set Decoration Gwen Wakeling Costume Design Edward O'Fearna Assistant Director