The rarely seen 17-year-old posed for a holiday snapshot with his father, three of his siblings and other members of his extended family while his mom, Melania, was missing because she is caring for her sick mother, Amalija.

But Barron's appearance is "truly monumental," according to Melania's former senior aide, Stephanie Winston Wolkoff, who told The Post we can expect to see more of the teen.

Barron has deliberately been kept out of the spotlight by his "strategic" mother, but was front and center in the photo posted by Kimberly Guilfoyle, Donald Trump Jr.'s fiancée, from Mar-a-Lago.