A borderline homeless teen, a fading racehorse on the seedy, dusty Southwestern side of the sport, Steve Buscemi and Chloe Sevigny.

Those are the ingredients of “Lean on Pete,” a star vehicle for young Charlie Plummer and another intimate, personal portrait from screenwriter/director Andrew Haigh (“45 Years,””Weekend”).

The studio that acquired “Moonlight” and “The Florida Project” and “Lady Bird” and “Ex Machina” and many of the coolest, most interesting indie features of the past few years, A24, is releasing “Lean on Pete” April 6.