She's having her fourth child, her third child with singer husband Seal.
Heidi is almost giving Nadya Suleman a run for her money. And she's doing it the old-fashioned way, without IVF treatments and welfare checks.
Heidi and Seal have two sons, Henry Günther Ademola Dashtu Samuel, 3, and Johan Riley Fyodor Taiwo Samuel, 2.
Seal is the adoptive dad to Klum's daughter, Helene "Leni" Klum, almost 5, whom she had with Italian businessman Flavio Briatore. She was already pregnant with her daughter when she and Seal met and fell in love.
According to the New York Daily News (via E!, Klum, 35, is a little less than four months pregnant).
She wasn't planning on announcing her pregnancy this early, but when sketches of her in a couture gown redesigned for a growing baby bump got posted on the Internet, it was pretty easy to guess what was going on.
And the big news for PR fans is that "Project Runway" returns to the Big Apple for its seventh season with shooting starting in the summer.
Wanna bet there's a maternity challenge coming?
The really annoying thing about this fourth-baby business? After three kids, she still looks great modeling lingerie and swimsuits. And she probably will after the fourth. It's mind-boggling.
We say don't give Nadya Suleman a reality show about raising lots of kids and looking amazing while doing it.
Give that show to Heidi Klum.
Photo: No, that is not a big lunch. It's Heidi and her son Henry Gunther Ademola Dashtu Samuel and her baby bump on April 13. Credit: FilmMagic