"Yellowstone" is one of the most-watched shows on TV for a good reason. Part of that success has to do with its stellar cast, anchored by Kevin Costner.

As Dutton family patriarch John Dutton, Costner serves as the linchpin member of his on-screen family, as well as the cast of actors surrounding him, with the Academy Award-winner helping to set the tone on the set of the show.

According to his co-stars, the example he sets is a positive one, showing that his decades of fame and success haven't gone to his head. In an exclusive interview with Looper, Kelly Reilly confirms what we all suspected about Kevin Costner

Kelly Reilly Confirms What We All Suspected About Kevin Costner - YouTube