The movie shows the last 10 days of Hitler’s life, from his 56th birthday on April 20th, 1945 to his suicide on April 30th.
The movie is based on the memoirs of Traudl Junge in the book Bis zur letzten Stunde. Hitlers Sekretärin erzählt ihr Leben, Until the Final Hour: Hitler’s Last Secretary and the book Inside Hitler’s Bunker of historian Joachim Fest.
Bruno Ganz prepared for the role with the only known recording of Adolf Hitler when he held a private conversation with Field Marshal Gustaf Mannerheim of Finland (WWII ally of Germany against Soviet). Recordings of Adolf Hitler speaking are nearly all samples of him giving speeches to large masses - his normal speaking voice was quite different.
Bruno Ganz studied Parkinson’s patients in a Swiss hospital to prepare for his role as Hitler