Donald Trump's controversial new chief executive has been a prominent figure in Hollywood since the early '90s.

Stephen Bannon of Breitbart News made the move over to team Trump Wednesday in order to hopefully help rejuvenate the Republican nominee's flailing campaign. Described by some as a "bare-knuckle brawler" in the world of political media, Bannon also has plenty of experience navigating liberal Hollywood.

The Hollywood Reporter published a lengthy analysis of Bannon's Hollywood ties Thursday, starting with his work with big entertainment companies as an investment banker at Goldman Sachs, where he specialized in mergers and acquisitions.

According to THR, he and a few Goldman colleagues branched off to start their own firm, Bannon & Co.

While there, he helped negotiate the sale of Castle Rock Entertainment to CNN founder Ted Turner. As partial payment for the sale, Bannon received stakes in "Seinfeld" and four other TV shows.

He eventually sold Bannon & Co. and became a partner at The Firm — a film, TV and music management company — with industry veteran Jeff Kwatinetz.

In addition to his business dealings with Hollywood bigwigs, Bannon also produced a few films in the '90s, including the Sean Penn vehicle "The Indian Runner" in 1991 and sci-fi movie "Titus" with Anthony Hopkins in 1999.

Bannon also either produced or directed numerous political documentaries, including ones on Ronald Reagan, Sarah Palin, the debt crisis, Occupy Wall Street and an adaptation of Peter Schweizer's book Clinton Clash: The Untold Story of How and Why Foreign Governments and Businesses Helped Make Bill and Hillary Rich.

THR talked to a few conservatives who work in Hollywood about the choice of hiring Bannon, and at least one thinks that his pop culture savvy will serve Trump well.

"This is terrific for Trump because Bannon understands pop culture," Lionel Chetwynd, a co-founder of conservative Hollywood group Friends of Abe, told THR. "There's a division between those who think no Republican can win without shaping the message to each identity block and those who call that pandering and a recipe for losing. Bannon represents a victory for the former group. Enough with the pandering!"

Another expert they cited used a "Seinfeld" reference to express his displeasure with the move.

"Trump's latest move would be a masterstroke — in the bizarro world," said John Pitney, the Roy P. Crocker Professor of American Politics at Claremont McKenna College. "He has a 66 percent unfavorable rating, so now he will do much more of what got him there. He needs to reach beyond his hardcore base, so he picks a guy who focuses on that base?"

This isn't the first time Trump has added a Hollywood insider to his campaign. Earlier in August, he tapped Steve Mnuchin to be his national finance director. Mnuchin has produced Hollywood blockbusters ranging from "Suicide Squad" to "American Sniper."