When hasn’t Kevin Costner been a pain in the you-know-what?

Fans of the hit Western series “Yellowstone” probably aren’t happy with news that the show might end only halfway through Season 5, reportedly because the show’s star Kevin Costner only wants to commit to one more week of shooting, while many of the cast, crew and studio executives have become “frustrated by his ego and his unavailability,” a report said.

“I know, get in line,” said Puck writer Matthew Belloni. He jokes that “‘Aging Movie Star Doing Television Has Inflated Sense of Self’ sounds like an Onion headline” but said that the 68-year-old Costner has long been known for having an outsized ego in a business filled with people with big egos.

“There’s a reason Costner is known in town as either exacting to a fault or an unjustified pain in the ass, going all the way back to his heyday in the ’90s,” Belloni said.

The reported standoff over Costner’s shooting schedule has fed reports that “Yellowstone” creator Taylor Sheridan and Paramount are moving to end their signature show after the fifth season but to extend the franchise surrounding the Dutton Family with other projects, including a new show starring Matthew McConaughey, Deadline said.

Meanwhile, the standoff over Costner’s shooting schedule has revived talk in Hollywood that the actor has always been difficult to work with. Costner rose to stardom in the 1980s and early 1990, starting with Brian DePalma’s “The Untouchables.” He became a heartthrob with “No Way Out,” “Bull Durham” and “The Bodyguard” and a symbol of American male integrity in the baseball classic, “Field of Dreams” and in Oliver Stone’s conspiracy drama, “JFK.” During that run, Costner also turned to directing. “Dances With Wolves” won him two Oscars, one for best picture and the other for director.

“Leveraging his star power and the cachet of the Oscars he won for ‘Dances With Wolves,’ Costner famously tortured filmmakers like Sam Raimi on 1999’s ‘For Love of the Game,’” Belloni said. In what was seen as a breach of professional protocol, Costner publicly complained about the final edits to the film, even though he wasn’t the director. At the time Universal Pictures co-chair Stacey Snider responded by saying, “Kevin’s not the director and it’s not fair for him to hijack a $50 million asset.”

Director Kevin Reynolds also was a Costner casualty, according to Belloni. Reynolds either bailed, or got fired from, two Costner vehicles, “Robin Hood: Prince of Thieves” and “Waterworld.” The latter was one of Costner’s mid-1990s post-apocalyptic epics. But it and “The Postman” were commercial and critical disappointments. As the director for “The Postman,” Costner refused to trim its three-hour running time despite “a pair of awful test screenings, and it lost tens of millions of dollars for Warner Bros.,” Belloni said. In another “big-time diva” move, Costner refused to do publicity for “Message in a Bottle,” a 1999 adaption of a Nicholas Sparks romance novel co-starring Robin Wright, unless he got his way on the final edit, Belloni added.

Since the 2000s, Costner has continued to work, win critical approval and earn money for studios, notably when he starred in the three-part miniseries “Hatfields & McCoys,” a show that broke viewership records for the History Channel and won Costner Emmy, SAG and Golden Globe awards for his performance.

Still, as Belloni said, Costner’s “heyday” ended a long time ago, prompting people to wonder why he’s not being more flexible with his schedule for “Yellowstone.” Dustin Rowles, a writer for the entertainment site Pajiba, said that Sheridan “basically resurrected Costner’s career” by giving him the part of John Dutton III, the patriarch of a powerful Montana ranching family.

“Yellowstone” also has given Costner the clout to direct his dream project, “Horizon,” the first of a planned series of independently financed Civil War-era Western films that Costner is co-writing, producing, directing, and starring in, Belloni and Rowles said. Costner’s deal with “Yellowstone” was supposed to give him time to work on “Horizon.”

The actor has responded to his renewed clout from “Yellowstone” with moves that have made him “difficult” to work with, according to Belloni. Friction between Costner and Sheridan grew when the star began giving the showrunner notes in the early seasons, which “didn’t go over well,” Belloni said. Once “Yellowstone” became the biggest show on TV, Costner is said to have made a number of demands, such as expected to be paid for promoting the show, despite earning $1.2 million per episode. Costner’s assistant also insulted Sheridan’s crime drama “Tulsa King,” starring Sylvester Stallone, tweeting and then deleting the comment: “Stick to westerns, bro. … I’m actually embarrassed for you as a writer and creator.”

The scheduling impasse has meant that Sheridan can’t finish writing episodes for the rest of Season 5, which was supposed to supposed to finish production in 2022 and air this summer. Busy with “Horizon,” Costner’s people reportedly have said he can only spare one week this summer, followed by two days in October, which means the second half of Season 5 won’t be able to air until the end of the year, at the earliest, Belloni said.

For his part, Costner reportedly is frustrated that Sheridan has been busy with so many other projects that he failed to deliver scripts on time and constantly moved the schedule around, a source told Belloni. His attorney, Marty Singer, also told Belloni that the claim that Costner was only willing to work one week this summer “is a lie.”

“As everyone who knows anything about Kevin is well aware, he is incredibly passionate about the show and has always gone way above and beyond to ensure its success,” Singer said.