Kristen Bell and Dax Shepard Welcome Baby Girl

Dax Shepard and Kristen Bell

The cool couple had fun on the carpet as they posed for photographers.

The couple made the announcement by posting an unexpected photo to Twitter

Christmas has come early for Kristen Bell and Dax Shepard.

The couple recently welcomed their second daughter, Delta Bell Shepard. The happy parents announced the news Friday on Twitter. 

Read more 'Parenthood's' Dax Shepard Sets Second 'About a Boy' Cameo

"The estrogen has now hit critical mass!" Bell, 34, tweeted. "Good luck, @daxshepard1. And welcome to the world DELTA BELL SHEPARD :)" She included a photo of an adult gorilla hand holding a baby gorilla's hand.

Shepard, 39, joked on Twitter about Delta: "She doesn't look like either @IMKristenBell or me, but we're gonna keep her anyway. #ChristmasCameEarly."

See more Oh Baby! Hollywood's Most Creative Pregnancy Announcements

The House of Lies actress and Parenthood actor tied the knot in October 2013. Their first daughter, Lincoln Bell Shepard, was born in March 2013.

Twitter: @_RyanGajewski