The film was cast with a "who's who" of Hollywood heavyweights, including Bette Davis, Mia Farrow, Maggie Smith, Lois Chiles, Simon MacCorkindale, Jon Finch, Olivia Hussey, Angela Lansbury, Jane Birkin, George Kennedy, Jack Warden, and David Niven.
The Hollywood Reporter
Warner Bros.
Kenneth Branagh's master detective Hercule Poirot might be getting a pretty "wonder"-ful co-star in the form[...]