Peter Ustinov as Hercule Poirot

Jane Birkin as Louise Bourget

Lois Chiles as Linnet Ridgeway Doyle

Bette Davis as Marie Van Schuyler

Mia Farrow as Jacqueline de Bellefort

Jon Finch as James Ferguson

Olivia Hussey as Rosalie Otterbourne

I.S. Johar as Mr. Choudhury

George Kennedy as Andrew Pennington

Angela Lansbury as Salome Otterbourne

Simon MacCorkindale as Simon Doyle

David Niven as Colonel Race

Maggie Smith as Miss Bowers

Jack Warden as Ludwig Bessner

Harry Andrews as Barnstaple

Sam Wanamaker as Rockford

Celia Imrie as Maid (uncredited)

Saeed Jaffrey as Servant (uncredited)

Barbara Hicks as Schoolteacher (uncredited)

François Guillaume as Doublure Lumière (uncredited)

Reg Lye as Workman (uncredited)

Andrew Manson as Egyptian (uncredited)