Question: The film "Open Range" was dedicated to the memory of the parents of one of the actors; who was the actor? 
Sentence (from "Open Range (2003 film)"): Open Range is a 2003 American western film directed and co-produced by Kevin Costner, starring Robert Duvall and Costner, with Annette Bening, Michael Gambon, and Michael Jeter appearing in supporting roles.
Relevant evidence: No