Burt Lancaster

Gen. James Mattoon Scott

Kirk Douglas

Col. Martin "Jiggs" Casey

Fredric March

President Jordan Lyman

Ava Gardner

Eleanor Holbrook

Edmond O'Brien

Sen. Raymond Clark

Martin Balsam

Paul Girard

Andrew Duggan

Col. William "Mud" Henderson

Hugh Marlowe

Harold McPherson

Whit Bissell

Sen. Frederick Prentice

Helen Kleeb

Esther Townsend

George Macready

Christopher Todd

Richard Anderson

Col. Murdock

Malcolm Atterbury

Horace the White House Physician (uncredited)

Al Bain

Reporter (uncredited)

Bill Baldwin

Announcer (voice) (uncredited)

Jack Berle

Reporter (uncredited)

Robert Brubaker

Gen. Diefenbach (uncredited)

William Challee

Gen. Riley (uncredited)

Stuart Holmes

Senate Committee Member (uncredited)

John Houseman

Vice Adm. Farley C. Barnswell (uncredited)

Rodolfo Hoyos Jr.

Capt. Ortega (uncredited)

Clegg Hoyt

Diner Operator (uncredited)

Colette Jackson

Bar Girl (uncredited)

Kenner G. Kemp

Senate Committee Member (uncredited)

John Larkin

Col. Broderick (uncredited)

Kent McCord

Presidential Aide (uncredited)

Tyler McVey

Gen. Hardesty (uncredited)

Charles Meredith

Senate Committee Member (uncredited)

Jack Mullaney

Lt. Dorsey Grayson (uncredited)

Ron Rich

Reporter (uncredited)

Charles Watts

Stewart Dillard (uncredited)

Fredd Wayne

Henry Whitney (uncredited)