Early in the year, Kevin Costner was widely seen as the stoic and highly respectable star of TV’s biggest drama. Now, the award-winning "Yellowstone" actor is at complete odds with his signature series, with reports that he’s exiting after the yet-to-finish-filming fifth season, and was reportedly blindsided this week by wife Christine Baumgartner filing for divorce after 18 years. In the midst of it all, the rumor mill has been quite busy, with Costner linked to reports that someone from the "Yellowstone" set got pregnant during production.