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 'Mutt' Henderson
Hugh Marlowe
Harold McPherson
Whit Bissell
Sen. Frederick Prentice
Helen Kleeb
Esther Townsend
George Macready
Christopher Todd
Richard Anderson
Col. Murdock
John Houseman
Vice-Adm. Farley C. Barnswell
Malcolm Atterbury
Horace - White House Physician (uncredited)
Jack Mullaney
Lt. (j.g.) Dorsey Grayson (uncredited)
Robert Brubaker
Gen. Diefenbach (uncredited)
Chuck Hamilton
Reporter (uncredited)