Christmas came right on time for Dax Shepardand Kristen Bell!

The Parenthood and House of Lies stars respected their second little girl on Friday, Dec. 19, they reported through Twitter.

"Delta Bell Shepard is here. She doesn't look like either Kristen or me, but we're gonna keep her anyway," Shepard, 39, wrote jokingly.

"The estrogen has now hit critical mass! Good luck, Dax. And welcome to the world DELTA BELL SHEPARD," Bell, 34, added.

Regardless of the new expansion, very little will change for enormous sister Lincoln, 21 months. "We were advised to get the most established first if both are crying," the on-screen character told PEOPLE in November.

Not long after her June report that she was expecting, Bell - whoshowed off her child paunch in an arrangement of dazzling groups all through her pregnancy - conceded the couple were stuck on a name for their second tyke.

"[We're] completely stumped," the mom-to-be said in July.

In any case just after two months, the folks to-be had a child name achievement. "We've settled on one, fortunately," Bell, who decided to keep their child's sex a mystery, told PEOPLE in September. "It's a considerable measure of weight, particularly in light of the fact that we felt Lincoln was so great."

In the days paving the way to Delta's entry, Shepard imparted a feature of his wife - whom he marry in 2013 - attempting her best to jolt work.

"Certain members of the family are READY for other members of the family to kindly exit their body," he captioned a video of Bell bouncing on a ball.