Linda Cardellini is a new mom after giving birth to a Leap Year baby last week.
 
The former "E.R." regular and "Scooby-Doo" star and her boyfriend Steve Rodriguez are celebrating the birth of their first child, daughter Lilah-Rose.
 
Cardellini announced her pregnancy in October and confessed she was struggling with baby names.
 
She said, "We have five different names we'll just pick out of a hat when we see her."