Actor Robert DeNiro went the offensive against Fox News on Sunday by dropping the F-bomb on CNN.

While appearing on CNN's Reliable Sources, host Brian Stelter asked the actor about criticism he gets from Fox News for speaking out against Donald Trump.

"This guy should not be president, period," DeNiro insisted.

"And when you say that, folks on Fox come after you," Stelter noted.

"Fuck 'em," DeNiro uttered. "Fuck 'em."

"You know, this is cable..." Stelter pointed out.

"Sorry!" DeNiro said.

"It's not an FCC violation," Stelter continued. "But it is still a Sunday morning."

"Let me say something," DeNiro interrupted. "We are at a point in this country where this guy [Trump] is like a gangster. He's come along and he's said things, done things we say over and over again, 'This is terrible. We're in a terrible situation.'"

"And this guy just keeps going on and on and on without being stopped," he concluded.

—@BrianStelter asks Robert De Niro about criticism he gets from Fox for speaking out against Trump.

"Fuck em," De Niro replies. "Fuck em."

Stelter reminds him, "This is cable, so it's not an FCC violation, but it is still a Sunday morning." pic.twitter.com/9IOo1VvXCM

— Oliver Darcy (@oliverdarcy) September 29, 2019