Kevin Costner could lose his property after his 'passion project' movie bombs at box office

Kevin Costner could potentially lose his home after his recent movie flopped at the box office.

The Yellowstone star partially self-funded his new movie Horizon: An American Saga after waiting decades to make - it was first commissioned back in 1988.

There are four Horizon films planned, with Costner starring and directing them.

His 15-year-old son Hayes also stars in the movie alongside the likes of Sienna Miller and Stranger Things' Jamie Campbell Bower.

Chapter Two is set to be released in just a few weeks time.

While Costner has a pretty stellar career behind him, he struggled to get funding for Horizon and ultimately put in a whopping $38 million of his own cash into making the film series.

Evidently a passion project for the 69-year-old, Costner previously admitted that he's 'not a very good businessman'.

Sienna Miller stars in Horizon: An American Saga. (Warner Bros.)

"I’ve mortgaged 10 acres on the water in Santa Barbara where I was going to build my last house," he admitted to Deadline last year.

"But I did it without a thought. It has thrown my accountant into a f**king conniption fit. But it’s my life, and I believe in the idea and the story."

Doubling down on his confidence in the film, Costner also told the outlet about putting his home on the line for Horizon's creation: "At the end of the day, I’m a storyteller, and I went ahead and put my own money into it. I’m not a very good businessman, so, scratch your head, if you will. I don’t know why, but I have not let go of this one.

"I’ve pushed it into the middle of the table three times in my career and didn’t blink. This is my fourth. And probably one of the few people in the world I could talk with about this would be with Francis."

Kevin Costner partially funded his new movie. (Michael Buckner/Variety via Getty Images)

But in the wake of Horizon hitting cinemas on June 28, it seems as if Costner's confidence in the flick might have been misplaced.

The movie has opened at the box office with just $11 million - a far cry from its $100 million budget.

Roughly a million people went out to watch it, The Hollywood Reporter says.

In comparison, Inside Out 2 and A Quiet Place: Day One brought in five million and 3.6 million viewers retrospectively.

With Horizon's disappointing opening figures in mind, the money Costner put into the film hangs in the balance - his 10-acre home included.

It's unlikely he'll lose his home, but Costner will likely be paying off Horizon's debts for some time.

UNILAD has approached Kevin Costner's reps for comment.