Gregory Peck as James McKay

Jean Simmons as Julie Maragon

Carroll Baker as Patricia Terrill

Charlton Heston as Steve Leech

Burl Ives as Rufus Hannassey

Charles Bickford as Major Henry Terrill

Alfonso Bedoya as Ramón Guiteras

Chuck Connors as Buck Hannassey

Chuck Hayward as Rafe Hannassey

Buff Brady as Dude Hannassey

Jim Burk as Blackie / Cracker Hannassey

Dorothy Adams as Hannassey Woman

Chuck Roberson as Terrill Cowboy

Bob Morgan as Terrill Cowboy

John McKee as Terrill Cowboy

Slim Talbot as Terrill Cowboy

Roddy McDowall as Hannassey Watchman (uncredited)

Richard Alexander as Party Guest - Oceans (uncredited)

Harry Cheshire as Party Guest (uncredited)

Ralph Sanford as Party Guest (uncredited)

William Hoehne Jr. as Lefty Hannassey cowhand (uncredited)

Donald Kerr as Liveryman (uncredited)

Chuck Hamilton as Party Guest (uncredited)