Real estate mogul and reality TV star Donald Trump's third wife is pregnant with his fifth child.

Melania Knauss, 35, is due in the spring, sources told Tuesday's New York Post.

"It's great news for Donald and Melania. Donald is a family man -- he loves children, and he's very excited," one friend told the newspaper. "He and Melania have talked about having a child, and now it's going to happen."

It's the first child for Knauss, who is reportedly designing a lavish nursery in their multimillion-dollar penthouse at the top of New York's Trump Tower.

Trump, 59, has an 11-year-old daughter, Tiffany, with Marla Maples; and Donald Jr., 27, Ivanka, 23, and Eric, 21, with his first wife, Ivana.