Pete Wentz Welcomes Son Saint Lazslo

Congratulations to Pete Wentz, who welcomed his newborn son to the world this week.

The Fall Out Boy bassist, 35, and his gorgeous model girlfriend, Meagan Camper, 25, gave birth to son Saint Lazslo on Wednesday, Aug. 20 in Los Angeles, his rep confirmed.

"Mom and baby are happy and healthy," the rep told PEOPLE Magazine on Aug. 21. "They are thrilled at the addition to the family and Bronx is over the moon to be a big brother."

Bronx is Wentz's 5-year-old son, and now big bro, from his previous marriage to singer Ashlee Simpson.

Saint Lazslo's sex was a surprise to the couple up until his birth.

"We're waiting," Wentz told PEOPLE in May. "I think we'll probably do a surprise on this one."

But it was not a surprise that the couple of three years were planning on starting a family together. Their intention was always to have kids, but to wait for the right moment.

"They've been planning this for a while," a source close to the family told PEOPLE in February.

Then, Wentz admittedly added to PEOPLE in May, "What's more exciting than having the pitter-patter of another little gremlin running around? Now it will be two-on-two."

Wentz recently made news for his drastic new hair do - sporting an edgy platinum blonde buzz on Instagram. Well, now hopefully fans will forgo the blonde pics for selfies with the new baby.

After all, there is nothing more precious than a father and his newborn son.