Kristen Bell, Dax Shephard welcome second baby daughter

Actress Kristen Bell and husband actor Dax Shepard, who exchanged wedding vows in October 2013, welcomed their second baby girl recently.

The happy couple, who already have a 19-month-old daughter Lincoln, named their second daughter Delta Bell Shepard, and announced the news of the newborn Friday on Twitter.

"The estrogen has now hit critical mass! Good luck, @daxshepard1. And welcome to the world DELTA BELL SHEPARD :)," Bell, 34, tweeted.

She included a photo of an adult gorilla's 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."