Mazel Tov!

Ivanka Trump and Jared Kushner are the proud parents of their second child, a baby boy.

"We just welcomed a beautiful & healthy son into the world," Trump tweeted yesterday.

The little guy joins 2-year-old sister Arabella Rose.

"Jared, Arabella and I couldn't be happier!" Trump, 31, wrote.

The daughter of Donald Trump and 32-year-old Kushner, publisher of the New York Observer, tied the knot in 2009.