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Vanessa Trump, Donald Trump Jr.

Dimitrios Kambouris/Getty Images for Make-A-Wish Metro New York

Donald Trump Jr. is going to be a father the fifth time around.

The 36-year-old businessman and his wife Vanessa Trump are expecting their fifth child. Donald Trump's son announced the pregnancy news via Twitter earlier today.

"Well @MrsVanessaTrump Kai, D3, T-man Spencer & I have some exciting news," he wrote. "We are expecting baby #5 this summer. Cant wait #evenlesssleep."

The couple already has four children, Kai, 6, Donald Trump III, 4, Tristan, 2, and Spencer, 1. Talk about one big brood!

Neither dad Donald nor sister Ivanka Trump have tweeted a congratulations on the big baby news, but we're sure it's coming.

Back in October 2012, Trump Jr. announced the birth of baby Spencer, writing, "It's a BOY!!! Vanessa and baby are doing great."

Meanwhile, Ivanka gave birth to her second child, baby boy Joseph, this past October. Ivanka and hubby Jared Kushner also have 2-year-old daughter Arabella.

Congrats!