Thomas A. Edison
Spencer Tracy
General Powell
Charles Coburn
'Acid' Graham
Milton Parsons
Bigelow
Arthur Aylesworth
Jimmy Price
Gene Reynolds
Mr. Johnson
Addison Richards
Snade
Grant Mitchell
Sheriff
Paul Hurst
Toastmaster
George Lessey
John Schofield
Jay Ward
Nancy Grey
Ann Gillis
First Lecturer
Erville Alderson
Bunt Cavatt
Lynne Overman
Minor Role
William Arnold
Broker
Hooper Atchley
Irving Bacon
Arthur Belasco
Party Guest
Edward Biby
Reporter
Billy Bletcher
Preacher
Harry C. Bradley
Bisbee
Harlan Briggs
Fritzi Brunette
Mechanic
John Butler
Mary Stilwell
Rita Johnson
James Carlisle
Gold Exchange Clerk
George Chandler
Howard Chase
James Conaty
Waiter
Jimmy Conlin
Nick Copeland
Maurice Costello
Woman
Nell Craig
Jack Daley
Policeman
Edgar Dearing
Mr. Taggart
Gene Lockhart
Helen Dickson
John Dilson
Jordan
Donald Douglas
Edward Earle
Galbreath
Frank Faylen
Man at Banquet
Walter Fenner
Cashier
Eddie Gribbon
Hale Hamilton
Sam Harris
Edward Hearn
Ben Els
Henry Travers
Arthur Stuart Hull
Harry Humphrey
Lecturer
Edward Keane
Marion Estelle Edison
Eve Kendall
Workman
Milton Kibbee
Second Lecturer
Charles Lane
Doctor
Edward LeSaint
Wilfred Lucas
Tom Mahoney
Eric Mayne
Michael Simon
Felix Bressart
Ralph McCullough
Minister
George Meader
Blair
Harold Minjir
Coachman
Bruce Mitchell
Hans Moebus
Edmund Mortimer
Forbes Murray
Louis Natheaux
Alex Novinsky
William H. O'Brien
Ashton
Peter Godfrey
Lamplighter
George Ovey
Thomas Pogue
Butler
Alexander Pollard
Cyril Ring
Count Stefenelli
Harry Strang
Clark
Charles Trowbridge
Secretary
Emmett Vogan
First Commissioner
Charles Waldron
Trailer Narrator (voice)
Frank Whitbeck
Lundstrom
Guy D'Ennery
Joe Whitehead
Lloyd Whitlock
Newsboy
Robert Winkler
Edwin Hall
Byron Foulger
Director
Clarence Brown
Music
Herbert Stothart
Original Story
Dore Schary
Screenplay
Bradbury Foote
Hugo Butler
Talbot Jennings