Killers of the Flower Moon is a 2023 American epic Western crime drama film co-written, produced, and directed by Martin Scorsese. Eric Roth and Scorsese based their screenplay on the 2017 non-fiction book by David Grann. Set in 1920s Oklahoma, it focuses on a series of murders of Osage members and relations in the Osage Nation after oil was discovered on tribal land. The tribal members had retained mineral rights on their reservation, but a corrupt local political boss sought to steal the wealth. Leonardo DiCaprio, Robert De Niro, and Lily Gladstone lead an ensemble cast, also including Jesse Plemons, Tantoo Cardinal, John Lithgow, and Brendan Fraser. It is the sixth feature film collaboration bet... ()