Kevin Costner says he won't be returning to Yellowstone: "It was something that really changed me"

Actor Kevin Costner announced he won't be returning "Yellowstone," saying he loved the popular series but realized he could not be able to continue.

The "Horizon" director and star shared his decision in an Instagram post on Thursday.

"I just want to reach out and let you know that after this long year and a half of working on 'Horizon' and doing all the things that's required and thinking about Yellowstone, that beloved series that I love — that I know you love," Costner said. "I just realized that I'm not going to be able to continue Season 5b or into the future."