Fall Out Boy Star Pete Wentz Welcomes Son

You'll never guess what the rock star named his son.

ByABC News
August 22, 2014, 10:14 AM
In this file photo, Meagan Camper, left, and Pete Wentz, right, are pictured on Feb. 2, 2013 in Chicago, Ill.
In this file photo, Meagan Camper, left, and Pete Wentz, right, are pictured on Feb. 2, 2013 in Chicago, Ill.
Daniel Boczarski/Getty Images

— -- Pete Wentz welcomed his new baby boy, People magazine reports.

The rock star, 35, and his girlfriend Meagan Camper had a son, Saint Lazslo, this past Wednesday, his rep confirms.

Read: Pete Wentz and Girlfriend Meagan Camper Are Expecting a Baby

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

Wentz's little boy joins his first son Bronx, 5, with ex Ashlee Simpson.

Wentz announced the great news this past February that his girlfriend was expecting.

“We’re super excited to announce we’re expecting a baby,” Wentz wrote on Instagram, alongside a photo of himself cuddling with his girlfriend.