Death on the Nile is a 1978 British mystery film based on Agatha Christie's 1937 novel of the same name, directed by John Guillermin and adapted by Anthony Shaffer. The film features the Belgian detective Hercule Poirot, played by Peter Ustinov, plus an all-star supporting cast including Maggie Smith, Angela Lansbury, Bette Davis, Mia Farrow, David Niven, George Kennedy and Jack Warden.

References:
https://en.wikipedia.org/wiki/Death_on_the_Nile_(1978_film)