Pete Wentz And Girlfriend Welcome Son, Saint Lazslo

Meagan Camper gave birth on Wednesday.

Congratulations, Pete Wentz, now there's a Saint in the house.

That's right, the Fall Out Boy bassist and model girlfriend Meagan Camper welcomed a son, Saint Lazslo, into their lives Wednesday in Los Angeles.

The couple, who have been dating for three years, chose to wait until their bundle of joy was born to learn the baby's sex.

"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."

Bronx is Wentz's 5-year old son from his previous marriage to Ashlee Simpson. Wentz and Camper, who had always intended to start a family together, threw a very chic baby shower back in May.

"What's more exciting than having the pitter-patter of another little gremlin running around," Wentz said. "Now it will be two-on-two."

Congratulations, Pete and Meagan!