Lady Caroline Lamb

Sarah Miles

Lady Caroline Lamb

Jon Finch

William Lamb

Richard Chamberlain

George Gordon, Lord Byron

John Mills

Canning

Margaret Leighton

Lady Melbourne

Pamela Brown

Lady Bessborough

Silvia Monti

Miss Milbanke

Ralph Richardson

George IV

Laurence Olivier

Duke of Wellington

Caterina Boratto

Peter Bull

Minister

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Roy Stewart

Black Pug

Michael Wilding

Lord Holland

Charles Carson

Potter

Sonia Dresdel

Lady Pont

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Nicholas Field

St. John

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Felicity Gibson

Girl in Blue

Robert Harris

Apothecary

Richard Hurndall

Radical

Paddy Joyce

Irish housekeeper

Bernard Kay

Benson

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Janet Key

Miss Fairfax

Mario Maranzana

Coachman

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Robert Mill

ADC to Wellington

Norman Mitchell

Restaurant functionary

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John Moffatt

Murray

Trevor Peacock

Agent

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Maureen Pryor

Mrs. Buller

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Fanny Rowe

Lady Holland

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Stephen Sheppard

Buckham

Ralph Truman

Admiral

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Jack Carter

Guest (uncredited)

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Esme Smythe

Guest (uncredited)