world premiere at the 2023 Cannes Film Festival, the first trailer for “Killers of the Flower Moon” has dropped courtesy of Apple TV+ and Paramount Pictures.The long-in-the-works adaptation of the David Grann book tells the true story of the murders of multiple Osage people in Oklahoma in the 1920s after oil was discovered on tribal land. Leonardo DiCaprio plays Ernest Burkhart, nephew of the murderous cattle tycoon William Hale, who is played by Robert De Niro, while Lily Gladstone plays Ernest’s wife Mollie.