"Yellowstone" star Kelly Reilly took a specific cue about her character from Kevin Costner - and it turns out she had a very ...

The truth about Yellowstone star Kevin Costner's relationships with his co-stars is being revealed and it's not pretty.

The story of "Yellowstone" is filled with bitter rivals, ego-fueled power grabs, and that ever-lurking threat of violence just waiting to explode. But apparently, that fictional drama got very real on ...