A source has dropped a bombshell allegation that “Yellowstone” creator Taylor Sheridan is largely to blame for a feud with star Kevin Costner. 

On Monday, The Post exclusively reported that “Yellowstone” will end after five seasons. This comes amidst rumored tension between Sheridan, 52, and Costner, 68. 

On Friday, a source told the Daily Mail that Sheridan developed a “God complex” on the set of his hit Paramount show. 

The source alleged that Costner, who is also an executive producer on the show, felt dismissed when he raised concerns about the direction that the story was taking — and that he was told to “stick to acting.” 

However, “Kevin will forever be proud of and grateful for Yellowstone and the cast is like family to him,” the source told the outlet. 

“He just felt like ‘Yellowstone’ is headed in a direction that was not in line with their initial vision and he was met with criticism, including that he should just stick to acting.”

No date has been set yet for when filming will begin for the second half of the final season. 

The ranching family drama, which follows John Dutton (Costner, who won a Golden Globe for the role) and his adult kids, including Beth (Kelly Reilly), Kayce (Luke Grimes), Jamie (Wes Bentley), and the late Lee (David Annable), has been a smash hit. 

Sheridan’s breakout hit has spawned several spin-off shows, including “1883” starring Sam Elliott, Tim McGraw and Faith Hill, “1923” starring Harrison Ford and Helen Mirren, the upcoming “6666,” and an upcoming spinoff starring Matthew McConaughey (that title currently hasn’t been announced). 

He also co-created the Paramount hits “Mayor of Kingstown” (starring Jeremy Renner) and “Tulsa King” (starring Sylvester Stallone).

Earlier in the week, a source told the The Post that Sheridan’s “overburdened” schedule has interfered with preparing and filming, even though Costner has made himself available. 

“Only Taylor truly knows what is going on,” a source told The Post. “Taylor spent years not being truly appreciated in Hollywood, and now that he’s the top of the heap, there’s definitely some ego to all of this.”

However, conflicting reports have also placed the blame on Costner. In February, Deadline reported that Costner refused to spend more than one week filming the second half of season 5 – which Costner’s attorney denied. 

Even with all of “Yellowstone’s” success, it’s unknown when the show will film its ending, amid the friction between Sheridan and Costner. 

“It’s the same as with any showrunner and big star — there’s respect, but there’s friction,” a source told The Post. 

Paramount did not respond when the Post reached out for comment.