Folks seeing Hail, Caesar! will recognize most of the A-list stars in the film. But then there's Alden Ehrenreich, a relative unknown who just about steals the movie with his subplot as a cowboy actor who has to appear in a witty romantic drama. (Spoiler: It doesn't go well.) For Rolling Stone, I spoke with Ehrenreich, who in his short life (he's 26) has already worked with the Coen Brothers, Woody Allen, Francis Ford Coppola and Warren Beatty. You can read it here.