Donald Trump Jr. and Wife Expecting Baby No. 5!

Raechal Leone Shewfelt
Yahoo Celebrity

Donald Trump is getting ready to welcome another grandchild!

The mogul's 36-year-old son, Donald Trump Jr., has revealed that his wife of eight years, Vanessa, is pregnant with their fifth child. Their brood already includes Kai Madison, 6; Donald John III, 4; Tristan Milos, 2; and Spencer Fredrick, 15 months.

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

The Donald is also grandfather to daughter Ivanka's children, Arabella, 2, and Joseph, just 3 months old.

Still, don't even think about calling him you know what.

"Call me anything, but that!" the senior Trump told Ryan Seacrest during a radio interview in February 2012. "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!"

Other than disliking the label, Trump seems to have embraced his role as a grandparent. Ivanka revealed to Redbook in April 2013 that her dad was wonderful with Arabella — to an extent.

"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. Now that my brothers and I work with him, we've become even closer."

Congrats to the happy family!