Pete Wentz and Meagan Camper welcome their first child together! Credit: Timothy Hiatt/Getty Images

Pete Wentz is a dad again! The Fall Out Boy rocker and his girlfriend Meagan Camper welcomed their first child together, a baby boy, on Wednesday, Aug. 20, his rep confirms to Us Weekly.

"Mom and baby are happy and healthy. They are thrilled at the addition to the family and Bronx is over the moon to be a big brother," his rep tells Us of the new edition to their family, who they named Saint Lazslo.

The musician revealed his model girlfriend was expecting with an adorable Instagram this past Feburary. "We're super excited to announce we're expecting a baby," he captioned a snap of them snuggling in bed.

Wentz was previoulsy married to Ashlee Simpson for three years. Together they share 5-year-old son Bronx. Simpson is now engaged to Evan Ross.