Celebrity trainer Tracy Anderson and her husband Matt Mogol welcomed their their first bundle of joy on Monday, May 21. The couple named their daughter Penelope.
Baby girl Penelope weighed in at "5 lbs., 10 oz. and joins stepbrother Sam, Anderson's 13-year-old son with her first husband, former NBA star Eric Anderson".
The couple tied the knot September 2011.
[Photo courtesy of Michael Buckner/Getty Images]