President Trump’s top economic adviser, Larry Kudlow, hosted the publisher of a white nationalist, anti-immigration publication at his birthday bash, according to a report.

Peter Brimelow, 70, who founded Vdare.com in 1999, attended the party last weekend — a day after White House speechwriter Darren Beattie was axed after it was revealed he had spoken alongside the publisher on a 2016 panel, the Washington Post reported.

According to the Southern Poverty Law Center, Vdare.com is “an immigrant-bashing hate site that regularly publishes works by white supremacists, anti-Semites, and others on the radical right.”

Kudlow said Tuesday that Brimelow was a guest at his Connecticut home and is someone he has known “forever,” going back to their days in financial journalism.

He expressed regret when he was provided details of Brimelow’s promotion of white nationalists on Vdare.com.

“If I had known this, we would never have invited him,” Kudlow, who was a longtime contributor at CNBC before joining Team Trump, told the paper. “I’m disappointed and saddened to hear about it.”

He said Brimelow’s views on immigration and race are “a side of Peter that I don’t know, and I totally, utterly disagree with that point of view and have my whole life. I’m a civil rights Republican.”

Kudlow added that Brimelow has been “coming to my dinner parties for years” but that “none of this other stuff has ever come up.”

Brimelow, who has written for Dow Jones and National Review, has rejected the label “white nationalist,” but acknowledged to the Harvard Crimson in 2016 that his site does “certainly publish a few writers I would regard as ‘white nationalist’ in that they stand up for whites just as Zionists, black nationalists do for Jews, blacks, etc.”

In a statement, Brimelow said: “I’ve known Larry for nearly 40 years. I regard him as a personal friend. They knew my first wife, who died, and were most kind to Lydia when I remarried. We agreed to disagree on immigration long ago.”

A White House spokesman declined to comment to the Washington Post.