Congratulations are in order for Nicole Richie and her rocker boyfriend Joel Madden. They are now the parents of a baby girl, the couple's rep at Handprint Entertainment tells PEOPLE.com. Harlow Winter Kate Madden was born Friday at Cedars-Sinai Medical Center and weighed 6 lbs. 7 oz. "The beautiful healthy baby girl left the hospital with her ecstatic parents," says the rep, who confirmed the birth.