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Karlie Kloss is kosher, a family insider confirms.

The supermodel just got engaged to Josh Kushner, the brother of Jared Kushner, whose wife Ivanka Trump converted to Orthodox Judaism before their marriage in 2009.

But Kloss converted in early June, the insider said.

Ivanka studied for her conversion at Congregation Kehilath Jeshurun on East 85th Street, but it is not known where Kloss was instructed.

Ivanka and Jared keep kosher and observe the Sabbath. From Friday night until sundown on Saturday, they put aside their cellphones and disconnect from the rest of the world.

Rabbi Shmuley Boteach told me, “The Kushners are deeply observant. Charlie Kushner has an afternoon prayer service in his office every day.”

Boteach, author of “Kosher Sex,” said of Jared and Ivanka, “They are the first kosher couple in the White House. Ivanka has proven to everyone that her conversion was transformative. She’s a Jewish woman. She’s a role model.”

Ivanka, who sends her 7-year-old daughter Arabella to a Jewish day school in DC, told Vogue three years ago, “It’s been such a great life decision for me . . . I really find that with Judaism, it creates an amazing blueprint for family connectivity.”