Ivanka Trump gives birth to a son

Businesswoman Ivanka Trump and New York Observer Publisher Jared Kushner attend The New York Observer 25th Anniversary Party at Four Seasons Restaurant on March 14, 2013, in New York.
Stephen Lovekin/Getty Images

It's a boy for Ivanka Trump and Jared Kushner.

Trump announced via Twitter on Tuesday that she had given birth to the couple's second child:

Proud grandfather Donald Trump also shared the news on his own Twitter page:

Trump, 31, and Kushner are already parents to 2-year-old daughter Arabella. She and the New York Observer owner married in 2009.

They had announced in April that baby No. 2 was on the way. Trump told Fit Pregnancy that she and her husband found out the sex of the baby, but kept it a secret until he arrived.

"I'm superstitious," she said. "I don't like to tell people, but I don't have the discipline to keep it a surprise. There are so many variables in motherhood that, those I can control, I like to."