Sarah Miles as Lady Caroline Lamb

Jon Finch as William Lamb

Richard Chamberlain as George Gordon, Lord Byron

John Mills as Canning

Margaret Leighton as Lady Melbourne

Pamela Brown as Lady Bessborough

Silvia Monti as Miss Milbanke

Ralph Richardson as George IV

Laurence Olivier as Duke of Wellington

Caterina Boratto as

Peter Bull as Minister

Roy Stewart as Black Pug

Michael Wilding as Lord Holland

Charles Carson as Potter

Sonia Dresdel as Lady Pont

Nicholas Field as St. John

Felicity Gibson as Girl in Blue

Robert Harris as Apothecary

Richard Hurndall as Radical

Paddy Joyce as Irish housekeeper

Bernard Kay as Benson

Janet Key as Miss Fairfax

Mario Maranzana as Coachman

Robert Mill as ADC to Wellington

Norman Mitchell as Restaurant functionary

John Moffatt as Murray

Trevor Peacock as Agent

Maureen Pryor as Mrs. Buller

Fanny Rowe as Lady Holland

Stephen Sheppard as Buckham

Ralph Truman as Admiral

Jack Carter as Guest (uncredited)