Robert Duvall first went to Texas at age 10, when he was a San Diego military brat on a visit to his mother's family. The trip marked his first time on a horse and his first encounter with the people he would later come to know so well.

"These aunts would back up to the fire and lift their skirts to warm their behinds, and I never saw that before," says Duvall, now 83, while having a bowl of soup at the old Driskill Hotel in Austin. "The name of the family was Hart, so we said 'They warmed their hearts.' "

He's never lived in the Lone Star State, but he was embraced as a cultural icon here after his acclaimed performance as Capt. Gus McCrae of the Texas Rangers in "Lonesome Dove," the 1989 TV miniseries based on the epic Larry McMurtry novel. It remains Duvall's favorite role, and in 2011, he was made an honorary ranger.

" 'Lonesome Dove' is a big thing down here," Duvall says, looking fit in a puffy black vest over a long-sleeved shirt, a painting of the Texas star and the word "Friendship" hanging nearby. He draws a comparison to a 1972 classic from his career: "I remember walking into the mess hall one day on 'Lonesome Dove.' I said, 'Boys, we're making a "Godfather" of Westerns.' "

As the aging, ill-tempered modern rancher Red Bovie, Duvall returns to Texas in "A Night in Old Mexico," which had its North American premiere last month at the South by Southwest festival in Austin and goes into limited release around the country May 16. He describes Bovie as "like the descendant" of the rangers from "Lonesome Dove," but caught at a moment of real despair. After losing his land in foreclosure after four generations in the family, and facing an unthinkable existence confined to a trailer park, the old cowboy prepares for suicide.

His plans suddenly change, however, when he meets Gally (Jeremy Irvine), an adult grandson he never knew he had. "It's the ultimate surprise: The day you lose your ranch, this kid shows up -- the product of a son that ran off and left you, from a wife that ran off and left you," says Duvall.

Together, the duo cross into Mexico in search of good times and escape in a journey through bars and bordellos and scenes of abrupt violence and possible romance. "A Night in Old Mexico" was written by William D. Wittliff, who also scripted "Lonesome Dove," and is directed by Emilio Aragon.

Since Duvall's beginnings as an actor in the 1950s, his roles have taken a varied path through the urban and the rural -- from director George Lucas' dystopian debut, "THX 1138," to the mysterious hermit in 2009's "Get Low." For Francis Ford Coppola, he was the Irish consigliere in two "Godfather" films and a surfing Lt. Col. Kilgore in "Apocalypse Now" ("I love the smell of napalm in the morning!"). Nominated six times for an Academy Award, he won for lead actor as a fallen country singer in 1983's "Tender Mercies."

Westerns have been part of his repertoire ever since appearing in TV cowboy dramas early in his career, but his first major role on horseback was in 1969's "True Grit," starring John Wayne. He enjoyed working with the veteran Hollywood star, who dominated the Western genre until his death in 1979.

"He was a good guy, and maybe underrated. When you see 'The Shootist' (from 1976), he was wonderful," says Duvall, recalling Wayne's final role as a gunman diagnosed with cancer. "He really had an ailment -- cancer -- whether he consciously or unconsciously used it (in his performance)."

Another lasting memory from "True Grit" is of director Henry Hathaway, who once declared on set: "When I say 'action,' tense up!"

It was a culture clash between old Hollywood and a new generation of actors under the brooding sway of Marlon Brando, a topic of discussion on many afternoons at Cromwell's Drugstore in New York City among pals Duvall, Dustin Hoffman and Gene Hackman, all future Oscar winners. "If we mentioned Brando once we mentioned him 25 times," Duvall recalls.

He first worked with Brando on "The Chase" (1966), and he remembers watching the actor talk and mumble in character before, during and after a take, all in one seamless action. "There was never a beginning. It was all the same," Duvall says. "I always remembered that. I probably learned from that."

They famously worked together again in 1972's "The Godfather," while the generational divide re-emerged when a well-known director visiting the set complimented the young actors (Duvall, James Caan, Al Pacino), but added, "I don't know about the director ...," recalls Duvall with a laugh. "In six lifetimes, this guy couldn't have done a movie that good. There's always somebody who isn't going to like something."

They were only occasionally in contact after completing "The Godfather," but in 1997, he got a letter from Brando warmly praising "The Apostle," the story of a preacher's profound fall from grace that Duvall wrote, directed and starred in. "The letter is maybe more important than my Oscar," Duvall says with a smile.

In Duvall's next film this year, he returns to an urban setting as the title character in "The Judge," with Robert Downey Jr., set for October release. After that, Duvall hopes for more quality time in Texas to make another film about the rangers. It would include a role for his Argentine wife, Luciana, 42, who appeared with Duvall in 2002's "Assassination Tango."

"Enough things come along now, but not a great amount, which is fine. Who knows how many more I'll do before they wipe the drool," says Duvall, who needs only a great script to begin building a character.

"I call it from ink to behavior. It begins with the written word, but what does that mean? It's different to make it into behavior. It's a journey."