 | Gregory Peck als Capt. Keith Mallory |
 | David Niven als Cpl. James Arthur Miller |
 | Anthony Quinn als Col. Andrea Stavros |
 | Stanley Baker als Pvt. 'Butcher' Brown |
 | Anthony Quayle als Maj. Roy Franklin |
 | James Darren als Pvt. Spyros Pappadimos |
 | Irene Papas als Maria Pappadimos |
 | Gia Scala als Anna |
 | James Robertson Justice als Commodore Jensen / Prologue Narrator |
 | Richard Harris als Squadron Leader Howard Barnsby RAAF |
 | Bryan Forbes als Cohn |
 | Allan Cuthbertson als Maj. Baker |
 | Michael Trubshawe als Weaver |
 | Percy Herbert als Sgt. Grogan |
 | George Mikell als SS Hauptman Sessler |
 | Walter Gotell als Muesel |
 | Tutte Lemkow als Nicolai |
 | Albert Lieven als Commandant |
 | Norman Wooland als Group Captain |
 | Kleo Skouloudi als Bride |
| Nicholas Papakonstantinou als Patrol Boat Captain |
 | Christopher Rhodes als German Gunnery Officer |
| William Hoehne Jr. als German Officer on Navarone |
| Andrew Andreas als Wedding Guest (uncredited) |
| Victor Beaumont als German Officer in Gun Cave (uncredited) |
| Jack Cooper als German Soldier on Patrol Boat (uncredited) |
| Maxwell Craig als German Soldier at Wedding (uncredited) |
 | Carl Duering als German Radar Operator (uncredited) |
| Peter Evans als German Soldier (uncredited) |
| Chick Fowles als German Soldier (uncredited) |
| Wolf Frees als Radio Operator (uncredited) |
| Alan Gibbs als German Officer (uncredited) |
| Peter Grant als British Commando (uncredited) |
 | Gerard Heinz als German surgeon (uncredited) |
| Frank Henson als Radio operator (uncredited) |
| Arthur Howell als German Officer (uncredited) |
| Walter Kightly als German Soldier (uncredited) |
 | Rosemary Nicols als Undetermined Secondary Role (uncredited) |
 | Robert Rietti als Mallory - German Voice (voice) (uncredited) |
 | Michael Sarne als Undetermined Secondary Role (uncredited) |
 | Bob Simmons als German Soldier on Navarone (uncredited) |
| John Tatham als General's Aide (uncredited) |
| Bob Wright als German Soldier (uncredited) |
| Terry Yorke als German Soldier (uncredited) |
| Stephen Zammit als Wedding Guest (uncredited) |
| J. Lee Thompson | Director |
| Alistair MacLean | Novel |
| Carl Foreman | Screenplay |
| Carl Foreman | Producer |
| Dimitri Tiomkin | Original Music Composer |
| Oswald Morris | Director of Photography |
| Alan Osbiston | Editor |
| John Wilcox | Additional Photography |
| Geoffrey Drake | Production Design |
| Harold Buck | Production Manager |
| Peter Yates | Assistant Director |
| Raymond Poulton | Associate Editor |
| John Victor-Smith | Associate Editor |
| Oswald Hafenrichter | Associate Editor |
| Denys N. Coop | Camera Operator |
| Bill Warrington | Special Effects |
| Wally Veevers | Special Effects |
| John Cox | Sound Recordist |
| George Stephenson | Sound Recordist |
| Chris Greenham | Sound Editor |
| Monty Berman | Wardrobe Supervisor |
| Olga Lehmann | Costume Design |
| George Frost | Makeup Artist |
| Wally Schneiderman | Makeup Artist |
| Pamela Davies | Continuity |
| Golda Offenheim | Other |
| Joan Morduch | First Assistant Editor |
| Fritz Bayerlein | Other |
| D. S. T. Turnbull | Other |
| P. F. Kertemilidis | Other |
| P. J. Hands | Other |
| John Theologitis | Other |
| N. Lazaridis | Other |
| W. D. Mangham | Other |
| Cecil F. Ford | Associate Producer |
| Leon Becker | Associate Producer |
| Dimitri Tiomkin | Songs |
| Paul Francis Webster | Songs |
| Alfred Perry | Songs |
| Elga Andersen | Other |
| Michael Walter | Key Grip |
| Mike Rutter | Clapper Loader |
| Jean Osborne | Publicist |
| Joan Smallwood | Hairdresser |
