Pete Wentz is a dad again!

The Fall Out Boy bassist and his girlfriend Meagan Camper welcomed their first child together on Wednesday, a baby boy named Saint Lazslo.

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"Mom and baby are happy and healthy," Wentz's rep told People. "They are thrilled at the addition to the family and Bronx is over the moon to be a big brother."

The musician took to Instagram back in February to reveal that the model was pregnant. "We're super excited to announce we're expecting a baby," he captioned a sweet snap of them snuggling in bed.

Wentz was previously married to Ashlee Simpson for three years. They have 5-year-old son, Bronx. Simpson is now engaged to Evan Ross.

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Congrats to the growing Wentz family!

What do you think of the baby's name? Sound off below.