<Ul> <Li> Jean Arthur as Clarissa Saunders </Li> <Li> James Stewart as Jefferson "Jeff" Smith </Li> <Li> Claude Rains as Senator Joseph Harrison "Joe" Paine </Li> <Li> Edward Arnold as Jim Taylor </Li> <Li> Guy Kibbee as Governor Hubert "Happy" Hopper </Li> <Li> Thomas Mitchell as "Diz" Moore </Li> <Li> Eugene Pallette as Chick McGann </Li> <Li> Beulah Bondi as Ma Smith </Li> <Li> H.B. Warner as Senate Majority Leader </Li> <Li> Harry Carey as President of the Senate </Li> <Li> Astrid Allwyn as Susan Paine </Li> <Li> Ruth Donnelly as Mrs. Hopper </Li> <Li> Grant Mitchell as Senator MacPherson </Li> <Li> Porter Hall as Senator Monroe </Li> <Li> Pierre Watkin as Senate Minority Leader </Li> <Li> Charles Lane as "Nosey", reporter </Li> <Li> William Demarest as Bill Griffith </Li> <Li> Dick Elliott as Carl Cook </Li> <Li> The Hopper Boys: <Ul> <Li> Billy Watson </Li> <Li> Delmar Watson </Li> <Li> John Russell </Li> <Li> Harry Watson </Li> <Li> Gary Watson </Li> <Li> Baby Dumpling (Larry Simms) </Li> </Ul> </Li> <Li> H.V. Kaltenborn as himself </Li> </Ul> <Li> Jean Arthur as Clarissa Saunders </Li> <Li> James Stewart as Jefferson "Jeff" Smith </Li> <Li> Claude Rains as Senator Joseph Harrison "Joe" Paine </Li>

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