Ashlee Simpson-Wentz had her baby last night at Cedars-Sinai Medical Center in LA. And she and new dad Pete Wentz named the new arrival — their first — Bronx Mowgli, a combination of the name of one of NYC's five boroughs and the boy hero in the beloved Jungle Book.

"Proud new parents Pete Wentz and Ashlee Simpson-Wentz welcomed new son, Bronx Mowgli Wentz, late this evening," a representative for the couple annnounced.

"Bronx weighs 7 lbs. 11 oz. and is 20.5 inches long," the rep said. "Ashlee, Pete and baby Bronx are all healthy and happy, and thank everyone for their well wishes!"

Photo Credit: WireImage