Watching the likes ofMartin Scorsese,Robert De Niro,Leonardo DiCaprioandLily Gladstonework their magic, especially in a film as richly painted asKillers of the Flower Moon, is a singular experience. Just ask the man who wrote the book.
“As a person who spends much of their time in archives looking at old documents, the last thing you ever expect is that a movie will be made,” author David Grann tells PEOPLE.
In the film, Gladstone plays thereal-life Mollie Kyle, whose family and community in the Osage Nation of 1920s Oklahoma were the targets of serial killings. DiCaprio plays Ernest Burkhart and De Niro, William King Hale.
“I really embarked on this project because it was a part of American history that was deeply known to members of the Osage nation, of course, but was largely excised from most Americans’ consciousness,” Grann says. “It’s bringing attention to this history and, hopefully, filling in some of those blank spaces in our memories that for too long had been there.”
Grann’s book,Killers of the Flower Moon: The Osage Murders and the Birth of the FBI, came out in 2017. Taking it from the page to the screen gave the writer a front-row seat to how some of the greats do their work, which he could only describe as “surreal.” After spending years bringing to the page the “dusty records” of the real people the movie follows, watching the characters become fully embodied on-screen felt remarkable, Grann says.
The “Killers of the Flower Moon” cast pose for a photo at The 2023 Gotham Awards.Mike Coppola/Getty Images for The Gotham Film & Media Institute

Mike Coppola/Getty Images for The Gotham Film & Media Institute
With subject matter as heavy asKillers of the Flower Moon, it was especially important to Grann that the Osage people be represented accurately, and the film undertaken with the sensitivity and care the subject deserves. He said that stepping onto set and seeing Osage people he knew from researching the book put his mind at ease.
“I think that authenticity, that involvement, that commitment on the part of the movie-makers on the whole production team to make sure that this was done in conjunction with the Osage was really important,” he says.
That dedication extends to the biggest names on set, with Grann calling DiCaprio’s process and performance “not just magical” but a testament to his dedication to his craft.
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Gladstone made history when shewon a Golden Globefor best actress for the film, and the people who embody that history agreed that she did it justice. One of Mollie’s descendants told Grann that “nobody else could have played Mollie,” the author says.
“When you see that connection, when you see that response you know they got it right,” he adds.
source: people.com