He tells us how he pulled off that 'Apocalypse Now' speech and about mooning people with Marlon Brando on the set of 'The Godfather'

Robert Duvall, Best Actor at the 56th Academy Awards in 1984

Robert Duvall as Boo Radley.

Robert Duvall (January 5, 1931) in his critically acclaimed performance as “Boo” Radley in, “To Kill A Mockingbird.”

Robert Duvall in Gods and Generals (2003)

Mirror mirror on the wall, who has the manliest mustaches of them all?

We interview the actor on the eve of his lifetime achievement honor at the Western Heritage Awards. Robert Duvall could have been a cowboy. Of course, the millions of moviegoers and TV viewers who have seen him in such classics as Lonesome Dove, Open Range, and Broken Trail might assume that he actually is a cowboy, and has been one for most of his life. But, well, that’s why they call it acting. “I represent cowboys, as opposed to really being one,” Duvall modestly insists during a recent…