Kevin Costner is paying tribute to Dances With Wolves costar Graham Greene following his death at age 73. "A few things come to mind when I think of Graham Greene and our time together on Dances With Wolves," Costner, 70, captioned an Instagram post on Tuesday, September 2. The actor shared a clip of himself and Greene from the 1990 movie. "I think of how willing he was to learn the Lakota language. I think of my joy when I heard that his work on the film was recognized with an @theacademy Awards nomination," he added, referencing his character in the film, Lt. John J. Dunbar.