Freddie Bartholomew as Young Jonathan Blake

Madeleine Carroll as Elizabeth Stacy

Guy Standing as John Angerstein

Tyrone Power as Jonathan Blake

C. Aubrey Smith as Old Q

Virginia Field as Polly

Douglas Scott as Horatio Nelson

George Sanders as Everett Stacy

J.M. Kerrigan as Brook Watson

Una O'Connor as Widow Blake

Forrester Harvey as Percival Potts

Gavin Muir as Gavin Gore

E. E. Clive as Magistrate

Miles Mander as Jukes

Montagu Love as Hawkins

John Burton as Lord Nelson

Arthur Hohl as First Captain

Robert Greig as Lord Drayton

Lumsden Hare as Captain Suckling

Will Stanton as Smutt

Murray Kinnell as Reverend Nelson

Billy Bevan as Innkeeper

Elsa Buchanan as Servant Girl

Georges Renavent as French Lieutenant

Reginald Barlow as Second Captain

May Beatty as Lady Markham

Lester Matthews as Captain Hardy

Vernon Steele as Thomas Lawrence

Barlowe Borland as Joshua Lamb

Hugh Huntley as Prince of Wales

Charles Croker-King as Willoughby

Ivan F. Simpson as Old Man

Holmes Herbert as Spokesman

Charles McNaughton as Waiter #1

Leonard Mudie as Waiter #2

Charles Coleman as Waiter #3

Thomas Pogue as Benjamin Franklin

Yorke Sherwood as Sam Johnson

Agostino Borgato as French Miller (uncredited)