The Koch brothers have reportedly been secretly funding Hollywood movies - including 'Wonder Woman'

Billionaire businessmen Charles G. Koch and David H. Koch seem to be the last people to have any interest in what goes on in Hollywood, but the heads of Koch Industries and prominent backers of right-wing politicians have secretly been funding some of the biggest movies out this summer.

According to The Hollywood Reporter, the Koch brothers have been silent investors in RatPac-Dune Entertainment for the last four years. The trade reports they have staked tens of millions of dollars into the company. RatPac-Dune is responsible for recent huge Hollywood blockbusters like "Batman v Superman: Dawn of Justice," and two of this summer's hit movies: "Wonder Woman" and "Dunkirk." All these titles were released by Warner Bros.

The brothers were brought into the company in 2013 by current treasury secretary Steven Mnuchin, who founded RatPac-Dune with producer Brett Ratner. It was part of a $450 million investment deal the company did, according to THR. Because RatPac-Dune is a private company, this was never disclosed publicly.

Mnuchin is no longer involved in the company since joining the Trump administration, however the Koch brothers still are, as they are stakeholders in "Wonder Woman," "Dunkirk," and the upcoming Steven Spielberg movie, "Ready Player One."

The Koch brothers aren't favorites in the mostly liberal and environmentally-conscious circles of Hollywood. The brothers own 84 percent of Koch Industries, which has been criticized as a major contributor to polluting the environment. The brothers have also bankrolled years of lobbying campaigns to weaken environmental regulations.

So don't plan to see the Kochs' names in movie credits. "They're in it to make money. They're not in it for the recognition," a source told THR.

A spokesperson for Koch Industries told THR, "Charles Koch, David Koch and Koch Industries do not have any involvement with this investment."

Business Insider contacted RatPac-Dune Entertainment and Koch Industries for comment but did not receive an immediate response.