Ivanka Trump gave birth to her second child on Monday.
Her father, real eststae developer Donald Trump, was the first to reveal the news on Twitter.
"My beautiful daughter Ivanka just had a healthy baby boy. Jared and Ivanka are very proud!" Donald wrote late Monday night. "Thanks to all for the wonderful congratulation sent to me on the birth of Ivanka's little boy - so nice!"
The mother-of-two later revealed the birth on the same social media website early Tuesday.
"We just welcomed a beautiful & healthy son into the world. Jared, Arabella and I couldn't be happier!" she wrote.
The family has yet to reveal the boy's name.
Ivanka discussed her second pregnancy in the October/November 2013 issue of FitPregnancy.
"I feel amazing. I've been fortunate so far with this pregnancy," she said. "Thankfully, I never experienced morning sickness, but I did get a wave of fatigue that started at week 15 and went through week 17. I can't complain, because it dissipates so quickly, but waking up exhausted is not a fun feeling."
Ivanka and Kushner welcomed their first child, daughter Arabella, in July of 2011. The couple's second child is Donald's sixth grandchild. The billionaire's son, Donald Trump, Jr. has four children with his wife.