The 2017 war drama Darkest Hour was heavily acclaimed, but historians and audiences also note that the film changed certain aspects of Winston Churchill’s life to evoke more drama. Helmed by Joe Wright (Pride and Prejudice, Atonement), the movie recounts the early years of Churchill’s tenure as Prime Minister of the United Kingdom and his stringent measures during the onset of World War II. Gary Oldman has played many real people in his career, but it is his transformative turn as Churchill that earned him the Oscar for Best Actor. Oldman’s performance was universally acclaimed and contributed greatly to Darkest Hour’s success.

https://screenrant.com/darkest-hour-true-story-every-change-movie/