Gregory Peck

Character: Capt. 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 (Hornblower's Batman)

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)

Amy Veness

Character: Mrs. McPhee (Hornblower's Housekeeper)

Kynaston Reeves

Character: Adm. Lord Hood

Ronald Adam

Character: Adm. McCartney

Chris Adcock

Character: Crewman (uncredited)

Basil Bartlett

Character: Capt. Elliott (uncredited)

André Belhomme

Character: French Guard (uncredited)

David Birks

Character: Crewman (uncredited)

Robert Cawdron

Character: "Witch of Endor" French Mate (uncredited)

Diane Cilento

Character: Maria Hornblower (voice) (uncredited)

Howard Connell

Character: "Lydia" Seaman (uncredited)

Alexander Davion

Character: Spanish Officer (uncredited)

Steve Donahue

Character: Crewman (uncredited)

Patric Doonan

Character: Seaman (uncredited)

Anthony Forwood

Character: Lt. Woodford (uncredited)

Arthur Gomez

Character: French Corvette Captain (uncredited)

Lindsay Hooper

Character: Crewman (uncredited)

Richard Johnson

Character: Macrae (uncredited)

Howard Lang

Character: Officer Aboard Cassandra (uncredited)

Jim Brady

Character: Bosun's Mate (uncredited)

Fred Haggerty

Character: Seaman (uncredited)

Sam Kydd

Character: Seaman Garvin (uncredited)

Anthony Marlowe

Character: Capt. Bolton (uncredited)

Michael Mellinger

Character: Spanish Officer (uncredited)

Julio Monterde

Character: Spanish Officer (uncredited)

Peter Morton

Character: Hommel (uncredited)

Jack Stewart

Character: Seaman (uncredited)

Derek Sydney

Character: Capt. Elliott (uncredited)

Jack Taylor

Character: Seaman (uncredited)

John A. Tinn

Character: Juan (uncredited)

Russell Waters

Character: Seaman (uncredited)

Del Watson

Character: Crewman (uncredited)

Jack Watson

Character: Capt. Sylvester (uncredited)

Byron Webster

Character: Seaman (uncredited)

Patrick Young

Character: Lt. Radot (uncredited)