Gregory Peck
Role: Capt. Horatio Hornblower R.N
Virginia Mayo
Role: Lady Barbara Wellesley
Robert Beatty
Role: Lt. William Bush
Moultrie Kelsall
Role: Lt. Crystal
Terence Morgan
Role: 2nd Lt. Gerard
James Kenney
Role: Midshipman Longley
James Robertson Justice
Role: Seaman Quist
Denis O'Dea
Role: RAdm. Sir Rodney Leighton
Richard Hearne
Role: Polwheal (Hornblower's Batman)
Michael Dolan
Role: Surgeon Gundarson
Stanley Baker
Role: Mr. Harrison (Bosun)
Alan Tilvern
Role: Hernandez
Alec Mango
Role: El Supremo (Don Julian Alvarado)
Christopher Lee
Role: Spanish Captain
John Witty
Role: Capt. Entenza
Michael Goodliffe
Role: Col. Caillard - POW Escort
Eugene Deckers
Role: French Commandant
Ingeborg von Kusserow
Role: Hebe (Lady Barbara's Maid)
Amy Veness
Role: Mrs. McPhee (Hornblower's Housekeeper)
Kynaston Reeves
Role: Adm. Lord Hood
Ronald Adam
Role: Adm. McCartney
Chris Adcock
Role: Crewman (uncredited)
Basil Bartlett
Role: Capt. Elliott (uncredited)
André Belhomme
Role: French Guard (uncredited)
David Birks
Role: Crewman (uncredited)
Robert Cawdron
Role: "Witch of Endor" French Mate (uncredited)
Diane Cilento
Role: Maria Hornblower (voice) (uncredited)
Howard Connell
Role: "Lydia" Seaman (uncredited)
Alexander Davion
Role: Spanish Officer (uncredited)
Steve Donahue
Role: Crewman (uncredited)
Patric Doonan
Role: Seaman (uncredited)
Anthony Forwood
Role: Lt. Woodford (uncredited)
Arthur Gomez
Role: French Corvette Captain (uncredited)
Lindsay Hooper
Role: Crewman (uncredited)
Richard Johnson
Role: Macrae (uncredited)
Howard Lang
Role: Officer Aboard Cassandra (uncredited)
Jim Brady
Role: Bosun's Mate (uncredited)
Fred Haggerty
Role: Seaman (uncredited)
Sam Kydd
Role: Seaman Garvin (uncredited)
Anthony Marlowe
Role: Capt. Bolton (uncredited)
Michael Mellinger
Role: Spanish Officer (uncredited)
Julio Monterde
Role: Spanish Officer (uncredited)
Peter Morton
Role: Hommel (uncredited)
Jack Stewart
Role: Seaman (uncredited)
Derek Sydney
Role: Capt. Elliott (uncredited)
Jack Taylor
Role: Seaman (uncredited)
John A. Tinn
Role: Juan (uncredited)
Russell Waters
Role: Seaman (uncredited)
Del Watson
Role: Crewman (uncredited)
Jack Watson
Role: Capt. Sylvester (uncredited)
Byron Webster
Role: Seaman (uncredited)
Patrick Young
Role: Lt. Radot (uncredited)
