Hercule Poirot (UK: , US: ) is a fictional Belgian detective created by British writer Agatha Christie. Poirot is one of Christie's most famous and long-running characters, appearing in 33 novels, two plays (Black Coffee and Alibi), and 51 short stories published between 1920 and 1975.
Poirot has been portrayed on radio, in film and on television by various actors, including Austin Trevor, John Moffatt, Albert Finney, Peter Ustinov, Ian Holm, Tony Randall, Alfred Molina, Orson Welles, David Suchet, Kenneth Branagh, and John Malkovich.
Source : Wikipedia