Fall Out Boy Star Pete Wentz Welcomes Son

— -- 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.