Jason Isaacs revealed that one of his “global icon” co-stars was the “worst bully ever.”

The “White Lotus” star recalled a prominent actor pushing him out of a shot in a candid interview with Vulture, published Monday.

“Oh Jesus. Did worse than that,” the actor remembered.

The unnamed A-lister “did all the old tricks of doing a completely different performance off-camera than on,” Isaacs, 62, claimed.

“Yeah, it sucked. I’d never seen anything like it,” he continued. “Before, I would’ve licked the ground that this person walked on.”

While the “Harry Potter and the Chamber of Secrets” star did not identify the thespian in question, he did share that there are many people he has worked with who were “bonkers.”

“When I think someone’s terrible, someone else might think they’re brilliant. One of the things that’s very charismatic is madness,” he told the outlet.

Isaac clarified that what he “mostly … judge[s] on set is bad behavior.”

He said, “It’s selfishness, cruelty, bullying, or people complaining to the person who’s getting them dressed, who doesn’t get in a year what they earn in a day to pick their filthy underwear off the floor.”

Isaacs also notices when actors don’t show up, leave work to go home early, do drugs and call “prostitutes to their trailer.”

“I come across all that stuff,” he shared.

Isaacs said he would not name any names because “there is no value, other than masochism and sabotage, in telling people the truth about people I’ve worked with or experiences I’ve had.”

He concluded, “Acting is all about secrets.”

Elsewhere in the interview, Isaacs spoke about the “very low” paycheck of $40,000 per episode that he and his co-stars received for working on Season 3 of “The White Lotus.”

“Generally actors don’t talk about pay in public because it’s ridiculously disproportionate to what we do — putting on makeup and funny voices — and just upsets the public,” he said.

“But compared to what people normally get paid for big television shows, that’s a very low price.”

However, the Golden Globe nominee acknowledged, “The fact is, we would have paid to be in it. We probably would have given a body part.”