Glenda Jackson as Lady Hamilton

Peter Finch as Adm. Lord Horatio Nelson

Michael Jayston as Capt. Hardy

Anthony Quayle as Lord Minto

Margaret Leighton as Lady Frances Nelson

Dominic Guard as Master George Matcham

Nigel Stock as George Matcham

Barbara Leigh-Hunt as Catherine "Catty" Matcham

Roland Culver as Lord Barham

Richard Mathews as Rev. William Nelson

Liz Ashley as Sarah Nelson

John Nolan as Capt. Blackwood

André Maranne as Adm. Villeneuve

Clelia Matania as Francesca

Pat Heywood as Emily

Stephen Jack as Major-domo

James Cossins as McKillop (uncredited)

David de Keyser as French Commander (uncredited)

Nicholas Lyndhurst as Shot Cabin Boy (uncredited)

Philip Madoc as French Captain (uncredited)

Ken Parry as Victory's Cook (uncredited)