“THIS S—T HAS TO STOP AND NEEDS TO BE LOOKED AT,” the “Aquaman” star wrote in a heated post on Instagram on Monday. “@ray8fisher AND EVERYONE ELSE WHO EXPERIENCED WHAT HAPPEN UNDER THE WATCH OF @wbpictures NEEDS PROPER INVESTIGATION.”

Momoa, 41, then seemingly called out the movie studio for a report released in July that stated he would voice “Frosty the Snowman.” DC executives Jon Berg and Geoff Johns, whom Fisher, 33, claimed enabled Whedon’s alleged bad behavior, are set to work on the upcoming live-action film.

“I just think it’s f—ked up that people released a fake Frosty announcement without my permission to try to distract from Ray Fisher speaking up about the sh—tty way we were treated on Justice League reshoots,” Momoa said. “Serious stuff went down. It needs to be investigated and people need to be held accountable.”

The action star is expected to reprise his role of “Aquaman” in a sequel and is currently starring in another Warner Bros. film, “Dune.”

Neither Momoa or Fisher have gone into specific detail about what allegedly occurred on the “Justice League” set, but Fisher, who played Victor Stone/Cyborg, tweeted in July that Whedon, 56, was “gross, abusive, unprofessional, and completely unacceptable.”

On Monday, Fisher accused Warner Bros. Pictures of conducting an unjust internal investigation into the allegations.

“To-date, the ‘independent’ firm hired by @wbpictures has conveniently avoided contacting key witnesses who gave damning statements to WB HR,” he tweeted. “They’ve also started interviews with (and have since ghosted) witnesses that have implicated former and current top level executives.”

Fisher added, “We will not let ANY investigator cherry-pick interviewees that best suit @wbpictures’ false narrative and scapegoating efforts. All with stories WILL be heard!”

Reps for Whedon and Warner Bros. Pictures did not immediately return Page Six’s request for comment.