Credit: Instagram Photo: JamieLynn Siglers ring.tiff

It was only a couple of weeks ago that Jamie-Lynn Sigler flashed her huge diamond ring, announcing her engagement to Cutter Dykstra.

Now The Sopranos and Entourage alum, 31, is pregnant with their first child. Jamie's rep confirmed the news to People: "She couldn’t be more excited! Jamie can't wait to be a mom."

The actress reportedly just told the cast and crew of her NBC show Guys With Kids. "The pregnancy was a shock," a source told Life & Style, which first reported the baby scoop. Jamie plays a mom on the show, so now she's a Gal With a Kid on the Way in real life!

And, as L&S notes, her best friend is actress Joanna Garcia, who is also expecting her first child. So it's like Jessica Simpson and Cacee Cobb all over again.

Congrats to the growing family!

Sources: Life & StylePeople