Naive and idealistic Jefferson Smith, leader of the Boy Rangers, is unexpectedly appointed to the U.S. Senate by the spineless governor of his state. Reunited with his childhood hero, Senator Joseph Paine, Smith soon confronts the harsh realities of political corruption in Washington, D.C. Smith’s sincere goal to establish a national boys' camp brings him into conflict with the powerful political boss, Jim Taylor, who seeks to control the state's politics. When Smith refuses to be corrupted, Taylor tries to ruin him with a scandal, setting the stage for a dramatic battle to defend integrity and democracy in the American government. **Cast:** - Jean Arthur as Clarissa Saunders - James Stewart as Jefferson "Jeff" Smith - Claude Rains as Senator Joseph Harrison "Joe" Paine - Edward Arnold as Jim Taylor - Guy Kibbee as Governor Hubert "Happy" Hopper - Thomas Mitchell as "Diz" Moore - Eugene Pallette as Chick McGann - Beulah Bondi as Ma Smith - H. B. Warner as Senate Majority Leader - Harry Carey as President of the Senate - Astrid Allwyn as Susan Paine - Ruth Donnelly as Mrs. Hopper - Grant Mitchell as Senator MacPherson - Porter Hall as Senator Monroe - Pierre Watkin as Senate Minority Leader - Charles Lane as "Nosey", reporter - William Demarest as Bill Griffith - Dick Elliott as Carl Cook **The Hopper Boys:** Billy Watson, Delmar Watson, John Russell, Harry Watson, Gary Watson, Baby Dumpling (Larry Simms) Other notable appearances include H. V. Kaltenborn as himself and Russell Simpson as Kenneth Allen. Supporting roles are filled by Dick Jones, Nick Copeland, Anne Cornwall, Gino Corrado, Maurice Costello, Alec Craig, Beatrice Curtis, Lew Davis, Dulcie Day, Wally Dean, Vernon Dent, Harry Depp, Robert Middlemass, Gladys Gale, and Stanley Andrews. **Runtime:** 125 minutes