Warner Baxter
Dr. Samuel Alexander Mudd
Gloria Stuart
Mrs. Peggy Mudd
Claude Gillingwater
Colonel Dyer
Arthur Byron
Mr. Erickson
O. P. Heggie
Dr. Mac Intyre
Harry Carey
Commandant
Francis Ford
Corporal O'Toole
John McGuire
Lieutenant Lovett
Francis McDonald
John Wilkes Booth
Douglas Wood
General Ewing
John Carradine
Sergeant Rankin
Fred Kohler Jr.
Sergeant Cooper
Ernest Whitman
Buck
Paul Fix
David Herold
Frank Shannon
Mr. Holt
Frank McGlynn Sr.
Abraham Lincoln
Etta McDaniel
Aunt Rosabelle
J.M. Kerrigan
Judge Maiben
Arthur Loft
Carpet Bagger
Paul McVey
General Hunter
Maurice Murphy
Orderly
Matthew Beard
Boy at Dr. Mudd's Door (uncredited)
Frank Baker
Undetermined Secondary Role (uncredited)
Stanley Blystone
Boy Seeking Dr. Mudd (uncredited)
Whitney Bourne
Undetermined Secondary Role (uncredited)
Lester Dorr
George A. Atzerodt (uncredited)
Robert Dudley
Druggist at Trial (uncredited)
Jan Duggan
Actress at Ford's Theatre (uncredited)
Dick Elliott
Actor at Ford's Theatre (uncredited)
Bess Flowers
Woman Sitting Behind Lincoln in Theatre Box (uncredited)
Bud Geary
Sergeant (uncredited)
Robert Homans
Sergeant (uncredited)
Paul Kruger
Soldier (uncredited)
Duke R. Lee
Sergeant (uncredited)
Wilfred Lucas
Testifying Colonel (uncredited)
Murdock MacQuarrie
Edman Spangler (uncredited)
James A. Marcus
Blacksmith (uncredited)
Eric Mayne
Court-Martial Participant (uncredited)
Paul McAllister
Doctor (uncredited)
J.P. McGowan
Ship's Captain (uncredited)
Wedgwood Nowell
Court-Martial Member (uncredited)
Jack Pennick
Corporal (uncredited)
George H. Reed
Black Man Giving Booth Directions (uncredited)
Paul Stanton
Agitating Orator (uncredited)
Tom Steele
Trooper (uncredited)
Harry Strang
Ship's Mate (uncredited)
Ray Turner
Black Soldier at Prison (uncredited)
Blue Washington
Black Soldier at Prison (uncredited)
Charles West
Washington (DC) Citizen (uncredited)
Lloyd Whitlock
Maj. Rathbone (uncredited)