The Trump family has officially grown by one.
Ivanka Trump and husband Jared Kushner gave birth to a baby boy Monday, and proud grandfather Donald Trump broke the good news.
"My beautiful daughter Ivanka just had a healthy baby boy. Jared and Ivanka are very proud!" he tweeted.
Not to be outdone, Ivanka fired off a tweet of her own.
"We just welcomed a beautiful & healthy son into the world. Jared, Arabella and I couldn't be happier!" the new mother posted.
The birth comes a week and a half before the couple's fourth wedding anniversary Oct. 25.
Ivanka Trump, 31, announced in April that she and Kushner, 32, were expecting a second child to join their 2-year-old daughter, Arabella Rose.
"Jared and I and are so excited that Arabella will become a big sister this fall," she tweeted at the time.
Donald Trump, 67, followed his announcement up by thanking everyone for their well wishes. The baby's name has yet to be revealed.