Austin Trevor

Hercule Poirot

Franklin Dyall

Sir Roger Ackroyd

Elizabeth Allan

Ursula Browne

J.H. Roberts

Dr. Sheppard

John Deverell

Lord Halliford

Ronald Ward

Ralph Ackroyd

Mary Jerrold

Mrs. Ackroyd

Mercia Swinburne

Caryll Sheppard

Harvey Braban

Insp. Davis

Clare Greet

(uncredited)