Kushner announced the arrival of their first child on Instagram on Sunday.
“Welcome to the world,” he wrote next to a photo of the newborn. His wife Kloss, a supermodel and “Project Runway” presenter, first revealed her pregnancy in a November Instagram video.
Kushner, the founder of an investment company, is the brother of Jared Kushner, the son-in-law of former President Donald Trump and a former White House adviser.
He and Kloss have been together since 2012. They became engaged in 2018 and were married later that year.
Fans were notoriously curious about the couple, raising questions in particular about the relationship between Kloss and her in-laws, Jared Kushner and Ivanka Trump. Kloss has spoken out about her support for the Democratic Party and posted about her support for President Joe Biden and Vice President Kamala Harris in the run-up to the 2020 election.
A Kloss representative did not immediately respond to a request for comment on Sunday.