Barry K. Barnes as Sir Percy Blakeney alias The Scarlet Pimpernel

Sophie Stewart as Marguerite Blakeney

Margaretta Scott as Theresa Cobarrus

James Mason as Jean Tallien

Francis Lister as Chauvelin

Anthony Bushell as Sir Andrew Foulkes

Patrick Barr as Lord Hastings

John Abbott as Flower Seller

David Tree as Lord Harry Denning

John Counsell as Sir John Selton

Henry Oscar as Maximilien Robespierre

Hugh Miller as De Calmet

Allan Jeayes as Judge of the Tribunal

O.B. Clarence as De Marre

George Merritt as Chief of Police

Evelyn Roberts as Prince Regent

Ben Williams as Robespierre's Spy