"My husband and I welcomed our beautiful, healthy baby boy to this world this morning! Biggest joy of my life!!! #lovemykid" the actress tweeted Tuesday. "PS and his name is ... Sebastian Zincone :) )) Love him more than life itself!! #whatafeeling !!!"
The 34-year-old "Rock of Ages" and "Watchmen" actress married Italian drummer Roberto Zincone in 2007.
Celebrity Families of 2014 [PHOTOS]