Peter Ustinov
Hercule Poirot

Jane Birkin
Louise Bourget

Lois Chiles
Linnet Ridgeway Doyle

Bette Davis
Marie Van Schuyler

Mia Farrow
Jacqueline de Bellefort

Jon Finch
James Ferguson

Olivia Hussey
Rosalie Otterbourne

I.S. Johar
Mr. Choudhury

George Kennedy
Andrew Pennington

Angela Lansbury
Salome Otterbourne

Simon MacCorkindale
Simon Doyle

David Niven
Colonel Race

Maggie Smith
Miss Bowers

Jack Warden
Ludwig Bessner

Harry Andrews
Barnstaple

Sam Wanamaker
Rockford

Celia Imrie
Maid (uncredited)

Saeed Jaffrey
Servant (uncredited)

Barbara Hicks
Schoolteacher (uncredited)

Reg Lye
Workman (uncredited)