Kristen Bell and Dax Shepard Welcome Another Baby Girl, Their Second Child Together—Check Out Her Name!

Actress and the Parenthood star add to their family just in time for Christmas

Christmas came early for Kristen Bell and Dax Shepard!

The couple have welcomed a baby girl, their second daughter together, Bell revealed Friday night via Twitter.

"The estrogen has now hit critical mass! Good luck, @daxshepard1. And welcome to the world DELTA BELL SHEPARD :)," she wrote alongside a photo of a mama monkey's hand holding the wee fingers of a baby monkey.

We're kinda diggin' that name! Delta joins big sister Lincoln in the family fold.

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," the infant's proud dad also tweeted. "She doesn't look like either @IMKristenBell or me, but we're gonna keep her anyway. #christmascameearly."

The couple kept the gender of their baby a secret throughout the pregnancy, but Shepard has hinted that more kids could be in their future.

"We're building a circus," he joked during a recent appearance on The Ellen DeGeneres Show. "Eventually, we want to get in a band and tour the country."

Bell recently opened up about their experiences as parents, the Veronica Mars star recalling how she surprised herself by how well she handled having a newborn the first time around.

"We've tried not to freak out, and I think we've done a good job so far," she told RedBook magazine. "But we also have tons of resources. There are hospitals, there's the Internet, there's 911. We took the baby to a CPR class, so there's really nothing to freak out about."

It also may have helped that the twosome adopted some pets before ultimately deciding to have a child of their own.

"Dax and I made a pact that we'd be second-child parents," she explained. "We wouldn't take all that nervous energy out on our first [child]. Instead we took it out on our dogs!"

The couple's latest bundle of joy comes at the perfect time for Shepard.

Earlier this month, the actor filmed the final scenes for his NBC show Parenthood. More time for changing diapers, right Kristen?

Bell, meanwhile, will be lending her voice to the upcoming Disney short Frozen Fever, a production we presume both Lincoln and Delta will thoroughly enjoy (albeit at different times, probably).

Congratulations to the happy couple. Enjoy the holidays with your new family member!