The 35-year-old Fall Out Boy bassist and his 25-year-old model girlfriend Meagan Camper welcomed their first child together, a baby boy, in Los Angeles Wednesday, according to People.
And they named their little one...Saint Lazslo! "Mom and baby are happy and healthy," Pete's rep told the mag. "They are thrilled at the addition to the family and Bronx is over the moon to be a big brother."
The couple, who has been dating for three years, didn't know the sex of their baby leading up to the delivery. Back in May, the musician told People they wanted to wait to find out what they were having. "I think we'll probably do a surprise on this one," he said.
"What's more exciting than having the pitter-patter of another little gremlin running around?" he said in May. "Now it will be two-on-two."
Pete is also dad to 5 ½ year-old Bronx from his previous marriage to Ashlee Simpson.
Congrats to the couple!