Fallout Boy rocker Pete Wentz has become a father for the second time after his girlfriend, Meagan Camper, gave birth to a healthy baby boy in Los Angeles on Wednesday.

The couple named him Saint Lazslo. Wentz also has 5-year-old Bronx with ex-wife Ashlee Simpson.

“Mom and baby are happy and healthy,” a rep for the couple told People. “They are thrilled at the addition to the family and Bronx is over the moon to be a big brother.”

Wentz and Camper, who have been dating since 2011, opted to be surprised at the sex of the baby.

"We’re waiting. I think we’ll probably do a surprise on this one,” Wentz told People back in May.

They announced they were expecting in February, with an Instagram post that read “We're super excited to announce we're expecting a baby."

Meanwhile, Simpson has moved on in a big way as well. She got engaged to Diana Ross’ son, Evan Ross, in January.

image via INFphoto.com