Hercule Poirot
Jane Wilkinson / Carlotta Adams
Inspector Japp
Captain Arthur Hastings
Ronald Marsh
Jenny Driver
Film Director
Donald Ross
Bryan Martin
Sir Montague Corner
Lord Edgware's Butler
Lord Edgware
Mr. Wildburn
Alice Bennett
Miss Carroll
Serious Actress (as Orianne Grieve)
Moxon (as Russell Keith-Grant)
Duke of Merton's Footman
Fluttering Young Man
Geraldine Marsh
Sir Montague's Butler
Duke of Merton
Mrs. Wildburn
Ellis the Maid
Movie Producer (uncredited)
Assistant Director (uncredited)
Self (uncredited)
Reporter (uncredited)