"We are beyond thrilled to announce the birth of our daughter, Lyla Maria Schwarzenegger Pratt," Chris wrote, also sharing two Bible verses. "We couldn’t be happier. Both mom and baby are doing great. We are extremely blessed. Love Katherine and Chris."
Meanwhile, Katherine wrote, "We are beyond thrilled to announce the birth of our daughter, Lyla Maria Schwarzenegger Pratt. We couldn’t be happier and we feel extremely blessed! Love, Katherine and Chris."
A source also told ET on Monday, "Katherine and Chris welcomed their first child together, a girl. The couple is so excited for their new addition and have been showered with love from their family and friends. Chris was there for the the birth and the couple can’t stop taking their eyes off their daughter. Katherine and Chris are doing well and Katherine is enjoying the experience of being a first-time mother."
"Giving birth was such a special moment for Katherine," the source added. "She was overcome with emotions when she first held her daughter and was so thankful to have Chris there. Everything is new for Katherine and she’s glad Chris is there to help her through everything."
The couple's first child together joins Chris' 7-year-old son, Jack, whom he shares with his ex-wife, actress Anna Faris. Chris and Katherine got married last June in an intimate ceremony in Montecito, California.