At the ceremony, Snooki, fiancé Jionni LaValle and baby Lorenzo were surrounded by family members and a few close friends.
Farley took to Twitter to document the event, posting a pic of her feeding a bottle to the 7-month-old, with the caption, "My precious godbaby… My love."
Snooki also shared her baptism excitement with fans, tweeting, “Lorenzo is finally baptized! He did so good. <3 proudparents."
Polizzi is currently writing her fourth book, a pregnancy guide for expecting moms.
Jenni "JWoww" Farley officially became the godmother to Nicole "Snooki" Polizzi's son at his christening on Sunday in New Jersey.