Gregory Peck character Captain Horatio Hornblower R N
Virginia Mayo character Lady Barbara Wellesley
Robert Beatty character Lt William Bush
Moultrie Kelsall character Lt. Crystal
Terence Morgan character 2nd Lt. Gerard
James Kenney character Midshipman Longley
James Robertson Justice character Seaman Quist
Denis O'Dea character RAdm. Sir Rodney Leighton
Richard Hearne character Polwheal
Michael Dolan character Surgeon Gundarson
Stanley Baker character Mr. Harrison (Bosun)
Alan Tilvern character Hernandez
Alec Mango character El Supremo (Don Julian Alvarado)
Christopher Lee character Spanish Captain
John Witty character Capt. Entenza
Michael Goodliffe character Col. Caillard - POW Escort
Eugene Deckers character French Commandant
Ingeborg von Kusserow character Hebe (Lady Barbara's Maid) (as Ingeborg Wells)
Amy Veness character Mrs. McPhee (Hornblower's Housekeeper)
Kynaston Reeves character Adm. Lord Hood
Ronald Adam character Adm. McCartney
