It's not something I planned on but after the long journey of getting here I can honestly say I have never been more proud of myself in my entire life.
“[Mabel] is delighted to have a new baby sister,” the rep added.
Bruce is surrounded by females, as he also has three daughters with ex-wife Demi Moore; Rumer Willis, 25, Scout Willis, 22, and Tallulah Willis, 20.
Rumer's sister, Tallulah, 23, got sober after entering rehab for substance abuse and an eating disorder in 2014.
She, too, expressed happiness at getting sober on social media, sharing a photo of herself looking drug-addled on Instagram.
Another long-awaited project "Indiana Jones and the Kingdom of the Crystal Skull" (2008) also made money, but ultimately left viewers cold.