Twilight's Bryce Dallas Howard and her husband, Fringe actor Seth Gabel, welcomed their second child last Thursday: A baby girl they've named Beatrice Jean.
Bryce's director/producer dad, Ron Howard, hit the social network to announce the baby news over the weekend.
"Beatrice Jean Howard-Gabel. Born Jan.19, 2012 8lbs 6oz. Bryce & Baby B are spectacular, Daddy Seth & brother Theo are beaming ear to ear :-)," the Frost/Nixon director proudly tweeted.
"Beatrice's arrival is hugely exciting for our family. Thanks for all the kind tweets folks," the former Happy Days actor later added.
Several other celebs took to Twitter to congratulate Mom and Dad on the birth of baby Beatrice, among them actress (and new mom) Jennifer Connelly and filmmaker M. Night Shyamalan, who directed Bryce in the 2004 film The Village.
Bryce and Seth are already the parents of a 4-year-old son, Theo. Howard has been candid about her struggles with postpartum depression after Theo's birth in 2007.
The starlet compared her post-birth experience to "suffering emotional amnesia." The depression rendered Bryce unable to "genuinely cry or laugh or be moved by anything."
"Before Theo was born, I had been in good humor about my 80-pound weight gain, but I was now mortified by it," Bryce, 30, wrote in a essay penned for Gwyneth Paltrow's Goop newsletter in 2009.
"I felt I was failing at breastfeeding. My house was a mess. I believed I was a terrible dog owner. I was certain I was an awful actress; I dreaded a film I was scheduled to shoot only a few weeks after the birth because I could barely focus enough to read the script. And worst of all, I definitely felt I was a rotten mother -- not a bad one, a rotten one," she continued.
"Because the truth was, every time I looked at my son, I wanted to disappear."
Seth eventually noticed the changes in Bryce's behavior and urged his wife to see a doctor. She was given the official "severe postpartum depression" diagnosis and ordered into treatment.
Howard has credited group therapy and Down Came The Rain -- Brooke Shields' 2005 tome about her own postpartum depression battle -- with helping her conquer the disorder.
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