The news arrives just days after Duff's sister (and "Our Lips Are Sealed" duet partner), Haylie, gave birth to a newborn girl of her own named Lulu Gray.
While you probably know Duff for starring on Disney's "Lizzie McGuire" and her teen pop career, you aren't alone if you've never heard of Koma. It's the second child for Duff and the first for Koma.
The actress recently revealed her mother Susan is a huge fan of her beau after they bonded at his recent birthday party.
Just Cause 4 Accidentally Leaked Ahead of its Reveal
The other odd thing about Just Cause 4 is that it means Swedish developer Avalanche Studios now has three games on the go. Today, Steam suffered from a slightly embarrassing situation where the company accidentally leaked Just Cause 4 .
Hilary, 30, rekindled her relationship with 31-year-old singer Matthew in December after splitting up in March last year after a few months of dating. "Timing is such a big deal... third time's a charm!" However, she hasn't always been so confident about showing it off.
Duff has a son, Luca, 6, with ex-husband Mike Comrie.
"I've gotten over the fact that I'm not going to have a baby that's close in age with Luca", she said. "I mean, this is the third time that we've dated". I love him so much.