After a brief interview with George Stevens for "Giant" (1956), Hinkle was hired to teach Rock Hudson to speak like a Texan. For $500 a week, Hinkle advised Hudson and also worked with James Dean, Elizabeth Taylor, and other actors. His approach was based on authenticity, believing that Texans 'linger over words like they're old friends, worthy of a cup of coffee'.
Hinkle also worked on "Hud" (1963) with Newman, Patricia Neal, and Melvyn Douglas, and directed a memorable scene. His influence extended through several films and television shows, solidifying his reputation in Hollywood.