Kristen Bell and Dax Shepard will be ringing in the new year with a newborn! The actress, 34, tweeted the news that she has given birth to a baby girl named Delta.



(Or she adopted some kind of primate. We're not 100 percent sure based on her twitpic Friday evening.)

The estrogen has now hit critical mass! Good luck, @daxshepard1. And welcome to the world DELTA BELL SHEPARD :) pic.twitter.com/72AFmnjmoC — Kristen Bell (@IMKristenBell) December 20, 2014

Delta Bell Shepard is here. She doesn't look like either @IMKristenBell or me, but we're gonna keep her anyway. #christmascameearly — dax shepard (@daxshepard1) December 20, 2014

Joking aside, this is the second child and second girl for the couple (hence the estrogen crack), who welcomed daughter Lincoln in March 2013, seven months before they tied the knot in a low-key ceremony.

The privacy-loving family did not realease any further details of the birth.

Related: Kristen Bell Donates $91,500 Worth of Baby Supplies to Families in Need

Pregnancy the second time around was apparently a breeze for the Frozen star.

"Same as the first one!" Bell told Us Weekly in September. "Really easy, thank God. I've had a lot of friends who have had rough pregnancies and I'm really, really thankful. People are affected differently by hormones, we're all different."

So what's next for the new parents? Some well-deserved time off.

“The baby's going to arrive right when we wrap our shows and we are both taking off tons of time to just canoodle as a family," Shepard, 39, told People in November.

Fortunately, the newborn-toddler balancing act doesn't seem to faze the couple. "I think we’ll probably get through it just like everybody else does, which is we’ll put it together day by day,” the House of Cards actress noted.

"We were told to pick up the oldest first if both are crying," said Shepard.

"It seems like a smart piece of advice," added Bell. "Since no one is imprinting memories of how you're treating [Lincoln] already and the newborn doesn't really know who's holding them."

"We know the first one is great so we don't want to ruin the first one," joked Shepard. "We'd rather roll the dice on the second one."

Time to roll away!