Nicole "Snooki" Polizzi gave birth to a 6-pound 5-ounce baby boy and is "so in love" with him, she said on Twitter.
Polizzi, 24, and fiance Jionni LaValle had their baby shortly before 3 a.m. Sunday at St. Barnabas Medical Center in Livingston, N.J.
A Polizzi representative told MTV: "The world just got another Guido! Lorenzo Dominic LaValle has entered the world weighing 6 pounds, 5 ounces. Nicole, Jionni and Enzo are doing great!"
"Jersey Shore" created a bit of controversy when it debuted in 2009 for the willingness of eight 20-somethings sharing a Jersey Shore summer house to call themselves "guidos" and "guidettes."
LaValle wrote on Twitter Monday he didn't know "what I enjoy more, watching my fiance sleep or watching my son sleep," adding "Both are amazing! #Lafamiglia"
Other Twitter messages from Polizzi, who didn't let giving birth keep her from the social network, include:
-- "Hardly any sleep but SO worth it!"
-- "Post birth isn't so comfy and glamorous. But my son is fabulous."
-- "Im finally able to eat eggs again! While I was pregnant I couldn't even smell them! Now I'm killing it with egg whites!!! #YUM"
Polizzi is one of the highest paid reality stars, earning $150,000 per episode as of Season Five, which ended March 15. MTV confirmed the series would return for a sixth season.
She says she got the nickname "Snooki" in high school because she was the first of her friends to kiss a boy. Snooki was a male character in the 2001 MTV film "Save the Last Dance."