Dennis Price as Lord Byron

Mai Zetterling as Teresa Guiccioli

Joan Greenwood as Lady Caroline Lamb

Linden Travers as Augusta Leigh

Sonia Holm as Annabella Milbanke

Raymond Lovell as John Hobhouse

Leslie Dwyer as Fletcher

Denis O'Dea as Prosecuting Counsel

Irene Browne as Lady Melbourne

Virgílio Teixeira as Pietro Gamba

Ernest Thesiger as Count Guiccioli

Gerard Heinz as Austrian Officer

Cyril Chamberlain as Defending Counsel

Wilfrid Hyde-White as Mr. Hopton

Henry Oscar as Count Gamba

Richard Molinas as Gondolier

Robert Harris as Dallas

Ronald Adam as Judge

Archie Duncan as John Murray

Barry Jones as Colonel Stonhope

Natalie Moya as Lady Milbanke

John Stone as Lord Clark

Nora Swinburne as Lady Jersey

John Salew as Samuel Rogers

Lena Lanare as La Fornarina

Betty Lynne as Signora Segati

Bernard Rebel as Doctor Bruno

Liam Gaffney as Tom Moore

Gilbert Davis as Tita

Vincent Holman as Bailiff

Guy Le Feuvre as Doctor

Aubrey Mallalieu as 1st Old club member

Desmond Roberts as 2nd Old club member

Zena Marshall as An Italian Woman