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

According to People Magazine, the 36-year-old businessman revealed on Twitter Tuesday that he and his wife of eight years, Vanessa, are expecting their fifth child together.

"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, who wedded in December 2005, already has four children, Kai, 6, Donald Trump III, 4, Tristan, 2, and Spencer, 1.

Trump, Jr. is the Trump Organization's Executive Vice President of Development and Acquisitions. He's appeared on his father's, Donald Trump, reality TV show "The Apprentice".

Trump's sister Ivanka and her husband Jared Kushner recently welcomed their second child, Joseph, in October. The couple already have Arabella, 2 1/2. The mother-of-two gushed to Redbook in April 2013 how wonderful her father was with Arabella.

"Oh, he takes her all the time - but with me," Ivanka said. "He wouldn't know what to do if she was crying or needed a diaper change. Although I think he'd figure it out. He was always a great father in that he was always there."

Donald told Ryan Seacrest during a radio interview in February 2012 that he is not a fan of his grandchildren calling him "grandpa."

"Call me anything, but that!" the senior Trump told Seacrest. "It's beautiful and endearing, but it's a tough term to get used to. Let them call me Mr. Trump. Let them call me Donald. Anything but Grandpa!"

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

— Donald Trump Jr. (@DonaldJTrumpJr) January 21, 2014