Gregory Peck as Capt. Keith Mallory

David Niven as Cpl. James Arthur Miller

Anthony Quinn as Col. Andrea Stavros

Stanley Baker as Pvt. 'Butcher' Brown

Anthony Quayle as Maj. Roy Franklin

James Darren as Pvt. Spyros Pappadimos

Irene Papas as Maria Pappadimos

Gia Scala as Anna

James Robertson Justice as Commodore Jensen / Prologue Narrator

Richard Harris as Squadron Leader Howard Barnsby RAAF

Bryan Forbes as Cohn

Allan Cuthbertson as Maj. Baker

Michael Trubshawe as Weaver

Percy Herbert as Sgt. Grogan

George Mikell as SS Hauptman Sessler

Walter Gotell as Muesel

Tutte Lemkow as Nicolai

Albert Lieven as Commandant

Norman Wooland as Group Captain

Kleo Skouloudi as Bride

Nicholas Papakonstantinou as Patrol Boat Captain

Christopher Rhodes as German Gunnery Officer

William Hoehne Jr. as German Officer on Navarone

Andrew Andreas as Wedding Guest (uncredited)

Victor Beaumont as German Officer in Gun Cave (uncredited)

Jack Cooper as German Soldier on Patrol Boat (uncredited)

Maxwell Craig as German Soldier at Wedding (uncredited)

Carl Duering as German Radar Operator (uncredited)

Peter Evans as German Soldier (uncredited)

Chick Fowles as German Soldier (uncredited)

Wolf Frees as Radio Operator (uncredited)

Alan Gibbs as German Officer (uncredited)

Peter Grant as British Commando (uncredited)

Gerard Heinz as German surgeon (uncredited)

Frank Henson as Radio operator (uncredited)

Arthur Howell as German Officer (uncredited)

Walter Kightly as German Soldier (uncredited)

Rosemary Nicols as Undetermined Secondary Role (uncredited)

Robert Rietti as Mallory - German Voice (voice) (uncredited)

Michael Sarne as Undetermined Secondary Role (uncredited)

Bob Simmons as German Soldier on Navarone (uncredited)

John Tatham as General's Aide (uncredited)

Bob Wright as German Soldier (uncredited)

Terry Yorke as German Soldier (uncredited)

Stephen Zammit as Wedding Guest (uncredited)