Amanda Peet at the 21st annual Light up a Life benefit for pediatric care hosted by The Komansky Center for Children's Health at NewYork-Presbyterian/Weill Cornell Medical Center. Photo Credit: Cutty McGill

Amanda Peet and her husband, David Benioff just welcomed a new baby girl. Molly June Benioff was born April 20,2010. Molly now joins big sister France Pen, who is 3 years-old. Peet canceled her appearance on Letterman because she went into labor. Peet is a spokeswoman for Every Child by Two, a non-profit organization that encourages parents to vaccinate their children.