| Capt. Horatio Hornblower R.N | 格利高里·派克
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| Lady Barbara Wellesley | 弗吉尼亚·梅奥
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| Lt. William Bush | 罗伯特·比提
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| Lt. Crystal | Moultrie Kelsall | |
| 2nd Lt. Gerard | Terence Morgan | |
| Midshipman Longley | James Kenney | |
| Seaman Quist (as James R. Justice) | 詹姆斯·罗伯逊·贾斯蒂
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| RAdm. Sir Rodney Leighton | Denis O'Dea | |
| Polwheal (Hornblower's batman) | Richard Hearne | |
| Surgeon Gundarson | Michael Dolan | |
| Mr. Harrison (bosun) | 斯坦利·贝克
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| Hernandez | 阿兰·提尔文
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| El Supremo (Don Julian Alvarado) | Alec Mango
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| Spanish captain | 克里斯托弗·李
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| Entenza | John Witty | |
| Col. Caillard (POW escort) | Michael Goodliffe | |
| French commandant | Eugene Deckers | |
| Hebe (Lady Barbara's maid) (as Ingeborg Wells) | Ingeborg von Kusserow | |
| Mrs. McPhee (Hornblower's housekeeper) | Amy Veness | |
| Adm. Lord Hood | Kynaston Reeves | |
| Adm. McCartney | Ronald Adam | |
| Capt. Elliott (uncredited) | Basil Bartlett | |
| French mate on 'Witch of Endor' (uncredited) | Robert Cawdron | |
| Voice of Maria Hornblower (uncredited) | 黛安妮·赛琳托
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| Seaman on 'Lydia' (uncredited) | Howard Connell | |
| Seaman (uncredited) | Patric Doonan | |
