Jessica Simpson and her fiancé Eric Johnson have welcomed their second child together -- a baby boy named Ace Knute Johnson!
A rep for the singer confirms to ET that the baby was born Sunday in Los Angeles.
"Ace Knute (pronounced Ka-nute) Johnson has arrived! Mom and baby are doing great," her rep told Us Weekly. "Jessica, Eric and Maxwell are thrilled to welcome the new addition to their family."
Simpson 32, and Johnson, 33, are already parents to a daughter, 13-month-old Maxwell.