Jean Arthur
Clarissa Saunders
James Stewart
Jefferson Smith
Claude Rains
Joseph Paine
Edward Arnold
Jim Taylor
Guy Kibbee
Governor Hopper
Thomas Mitchell
Diz Moore
Eugene Pallette
Chick McGann
Beulah Bondi
Ma Smith
H.B. Warner
Senate Majority Leader
Harry Carey
President of the Senate
Astrid Allwyn
Susan Paine
Ruth Donnelly
Emma Hopper
Grant Mitchell
Senator MacPherson
Porter Hall
Senator Monroe
Pierre Watkin
Senator Barnes
Charles Lane
Nosey
William Demarest
Bill Griffith
Dick Elliott
Carl Cook
Billy Watson
Peter Hopper
Delmar Watson
Jimmie Hopper
John Russell
Hopper Boy
Harry Watson
Garry Watson
Larry Simms
H.V. Kaltenborn
Radio Broadcaster
Russell Simpson
Kenneth Allen (uncredited)
Frances Gifford
Hopper Girl (uncredited)
Colin James Mackey
Narrator (uncredited)
Wilson Benge
Hopper's Butler (uncredited)
Dickie Jones
Richard Jones (uncredited)
Erville Alderson
Handwriting Expert (uncredited)
Frank Puglia
Maurice Cass
Stanley Andrews
Senator Hodges (uncredited)
Al Bridge
Senator Dwight (uncredited)
Edwin August
Senator (uncredited)
Edmund Cobb
Senator Gower (uncredited)
Sam Ash
Senator Lancaster (uncredited)
Harry A. Bailey
Senator Hammett (uncredited)
Stanley Mack
Brooks Benedict
Senate Clerk (uncredited)
Wade Boteler
Family Man (uncredited)
Dorothy Comingore
Woman at Station (uncredited)
Chester Conklin
Reporter (uncredited)
Gino Corrado
Barber (uncredited)
Ann Doran
Paine's Secretary (uncredited)
Robert Emmett Keane
Editor (uncredited)
Matt McHugh
Kathryn Bates
Committeewoman (uncredited)
Frank Austin
Inventor (uncredited)
William Arnold
Tommy Baker
Boy Ranger (uncredited)
Robert Sterling
Senate Reporter (uncredited)
Dub Taylor
George Chandler
Fred 'Snowflake' Toones
Porter (uncredited)
Jack Carson
Sweeney Farrell (uncredited)
Tommy Bupp
Cheering Boy (uncredited)
Dora Clement
Mrs. McGann (uncredited)
Bert Moorhouse
Man in Senate Building (uncredited)
Harry C. Bradley
Arthur Kim (uncredited)
Lynton Brent
Photographer (uncredited)
Ed Brewer
Harlan Briggs
Mr. Edwards (uncredited)
Harry Burkhardt
Frederick Burton
Senator Dearhorn (uncredited)
Georgia Caine
Third Radio Speaker (uncredited)
Ken Carpenter
Announcer (uncredited)
Burr Caruth
Townsend (uncredited)
Allan Cavan
Ragner (uncredited)
Eddy Chandler
Davison Clark
Committeeman (uncredited)
Richard Clucas
(uncredited)
Shirley Coates
Assistant Bartender (uncredited)
Eddie Coke
Hal Cooke
Alec Craig
Speaker (uncredited)
Anne Cornwall
George Cooper
Waiter (uncredited)
Georgie Cooper
Jack Cooper
Nick Copeland
Vernon Dent
Maurice Costello
Diggs (uncredited)
Beatrice Curtis
Lew Davis
Dulcie Day
Wally Dean
Paine's Friend (uncredited)
Harry Depp
Hat Salesman / Secretary (uncredited)
Byron Foulger
Hopper's Secretary (uncredited)
Helen Jerome Eddy
Douglas Evans
Francis Scott Key (uncredited)
Joe Devlin
Clyde Dilson
John Dilson
Secretary (uncredited)
Neal Dodd
Senate Chaplain (uncredited)
Lester Dorr
Taylor's Stooge (uncredited)
Robert Dudley
Edward Earle
Jack Egan
Eddie Fetherston
Mabel Forrest
Gladys Gale
Jack Gardner
Mary Gordon
Woman (uncredited)
June Gittelson
Lorna Gray
Harry Hayden
First Radio Announcer (uncredited)
Louis Jean Heydt
Soapbox Speaker (uncredited)
John Ince
Senator Fernwick (uncredited)
Frank Jaquet
Senator Byron (uncredited)
Philo McCullough
Senator Albert (uncredited)
Wright Kramer
Senator Carlton (uncredited)
Henry Hebert
Fred Hoose
Richard Kipling
Roger Haliday
Senate Guard (uncredited)
Wilfred Hari
House Boy (uncredited)
Philip Hurlic
Olaf Hytten
Butler (uncredited)
Lloyd Ingraham
Mitchell Ingraham
Dick Jensen
Hoodlum (uncredited)
John Lester Johnson
Eddie Kane
Donald Kerr
Milton Kibbee
Joe King
Summers (uncredited)
Evalyn Knapp
Paul Kruger
Bodyguard (uncredited)
Bobby Larson
Billy Lechner
Jackie Lowe
P.H. Levy
Rabbi (uncredited)
Vera Lewis
Mrs. Edwards (uncredited)
Jack Lindquist
Chorus Member (uncredited)
George Lloyd
Arthur Loft
Chief Clerk (uncredited)
Jack Low
Jimmie Lucas
Mary MacLaren
Head Sister (uncredited)
Hank Mann
Margaret Mann
Nun (uncredited)
Eric Mayne
Ralph McCullough
George McKay
Lafe McKee
Veteran at Lincoln Memorial (uncredited)
Ben Taggart
Pompous Man (uncredited)
Field Norton
Wilfred Lucas
Sammy McKim
James McNamara
William Newell
Robert Middlemass
Radio Announcer #2 (uncredited)
James Millican
Howard M. Mitchell
Shoe Salesman (uncredited)
Charles R. Moore
Gene Morgan
Robert Morgan
Ray Nichols
Alex Novinsky
Foreign Diplomat (uncredited)
Frank O'Connor
Senator Alfred (uncredited)
Frank Otto
Fisk (uncredited)
Joe Palma
Spencer Quinn
Tom Quinn
Ed Randolph
Charles Regan
Jack Rice
Lang (uncredited)
Wyndham Standing
Senator Ashman (uncredited)
Ferris Taylor
Senator Carlisle (uncredited)
Jack Richardson
Senator Manchester (uncredited)
Walter Soderling
Senator Pickett (uncredited)
Harry Stafford
Senator Atwater (uncredited)
Victor Travis
Senator Grainger (uncredited)
Carl Stockdale
Senator Burdette (uncredited)
Robert Walker
Senator Holland (uncredited)
Henry Roquemore
Craig Stevens
Paul Stanton
Flood a Newsman (uncredited)
Johnny Russell
Otis Hopper (uncredited)
Walter Sande
Newspaperman with Pipe (uncredited)
Frank M. Thomas
Hendricks (uncredited)
Harry Strang
Harry Tenbrook
Dave Willock
Lloyd Whitlock
Schultz (uncredited)
John Tyrrell
Frederick Vroom
Charles Sullivan
Cab Driver (uncredited)
Arthur Thalasso
Doorman (uncredited)
Edward Thomas
Laura Treadwell
Mrs. Taylor (uncredited)
Layne Tom Jr.
Myonne Walsh
Jane Hopper (uncredited)
Billy Wayne
Max Waizmann
John Ward
Jane Loofbourrow
Blanche Payson
Emma Tansey
Bess Wade
Florence Wix
Eleanor Wood
Jesse Graves
Black Committeeman (uncredited)
Gus Glassmire
Angry Committee Member (uncredited)
Larry Steers
Landers Stevens
William Worthington
Edward Biby
Count Stefenelli
David Wade
Frank McLure