Academy Award winners Robert Duvall and Billy Bob Thornton made their Grand Ole Opry debuts Tues., August 18. Duvall served as a guest announcer during the show and performed the song “Cheyenne”, with music producer Michael Hodges, from the original motion picture soundtrack Wild Horses . Roots-rock band The Boxmasters featuring Thornton and also consisting of Teddy Andreadis and J.D. Andrew performed a set including tunes from the 2015 release Somewhere Down The Road . Tonight’s show also included performances by Bill Anderson , Larry Gatlin , Dustin Lynch, Craig Morgan, David Nail, The Oak Ridge Boys , and Thomas Rhett . "It's an honor to be here," Thornton said during The Boxmasters set. "Thanks for coming out." After his guest announcer stint in which he reflected on his work in films such as To Kill A Mockingbird and Lonesom e Dove as well as sharing stories about country legends including Johnny Cash and Carl Smith, Duvall walked center stage ...