The Trump-Clinton second debate was definitely feisty, but it’s almost tame compared to a fiery feud that has erupted between two big Hollywood stars.

It started with Robert De Niro’s ugly, anti-Trump tirade video that went viral over the weekend. In an outtake from a celeb-filled PSA for the Vote Your Future organization, De Niro goes all “Raging Bull” on Trump, calling him “a dog,” “a pig,” “an idiot,” “a bozo,” “a national disaster,” and “an embarrassment to this country.”

“Let Donald Trump know we are completely behind him.” — Jon Voight

De Niro got even harsher: “He talks about how he’d like to punch people in the face? Well, I’d like to punch him in the face. This is somebody that we want for president? I don’t think so.”

Jon Voight, who stars in the Showtime hit “Ray Donovan,” stepped up on behalf of Trump.

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Voight, who has been a Trump supporter all along, appeared on Fox News last month and told host Neil Cavuto that Trump was “an extraordinary fellow who has accomplished much in his life,” and “clear and strong” in his intentions.

In response to De Niro, Voight took to Twitter to again — a lone voice in liberal Hollywood speaking up against the status quo.

“I am so ashamed of my fellow actor Bobby De Niro’s rant against Donald Trump. What foul words he used against a presidential nominee, who has worked harder than any other man I know in the past year-and-a-half to get a good message to the American people,” Voight wrote in two separate tweets.

In response to the Billy Bush tape with Trump remarks from 11 years ago, Voight said, “Donald Trump’s words were not as damaging as Robert De Niro’s ugly rant. Trump’s words did not hurt anyone. Can you imagine if any Republican said words like Robert De Niro used — against Hillary Clinton or Barack Obama? All hell would break loose.”

Voight went on to urge Trump supporters to stand by the Republican nominee for president.

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De Niro responded while speaking in Dubai to promote financial opportunities in the Caribbean, where he reportedly has multi-million-dollar investments in resorts in Antigua and Barbuda, according The National, which covered the event.

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De Niro continued his anti-Trump talk, saying, “This guy does not have a clue about what goes on in the rest of the world, no matter what he says.”

He also addressed his fellow actor.

“Voight is a nice guy,” said De Niro. “But he’s delusional.”