'Yellowstone' fans say they "can't wait" as Kevin Costner posts the first look at his next project. 

Kevin Costner's tenure on Yellowstone may be ending, but he's not leaving the Wild West anytime soon. 

The Paramount Network series is wrapping up after season 5 part 2 in November. 

Costner is busy with his upcoming project Horizon: An American Saga, where he serves as co-writer, star, and director. 

It marks his return to directing since the 2003 film Open Range. 

Costner shared a sneak peek on Instagram, revealing a three-minute trailer for the first installment of the four-film franchise. 

The first chapter of Horizon: An American Saga is set to hit theaters early this summer. 

Costner's Instagram post on February 26 teased the release: "This summer the American Saga begins." 

The trailer is also available on YouTube, generating excitement for the film's June 28 theatrical release. 

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