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Snooki’s little lady has arrived!

Former Jersey Shore star Nicole Polizzi and fiancé Jionni LaValle welcomed their second child, daughter Giovanna Marie, at 4:28 a.m. on Friday, Sept. 26, her rep confirms to PEOPLE.

“So happy to let you know we had our beautiful daughter this morning Giovanna Marie LaValle. 6.7 lbs, full head of black hair & perfect,” she announced via Twitter.

When Polizzi — who is already mom to 2-year-old son Lorenzo Dominic — got the news she was expecting a girl, the reality star paired up with costar Jenni ‘JWoww’ Farley to plan out their mini-me’s friendship.

“They f—ing better [get along],” Farley, told PEOPLE before giving birth to daughter Meilani Alexandra in July. “They’re basically cousins. There’s no option. You’re sisters.”

And Polizzi, 26, couldn’t agree more.

“Me and Jenni see each other almost every single day,” she says. “I just feel like our kids are bound to be best friends and hang out all the time. They’re going to grow up and be like cousins. They’ll like each other, I hope.”

So happy to let you know we had our beautiful daughter this morning Giovanna Marie LaValle. 6.7 lbs, full head of black hair & perfect💗💗😍

— Nicole Polizzi (@snooki) September 26, 2014

Thank you to all the outpouring love you guys are sending my growing family! We are so happy & can’t believe we have two kids! 😳❤️❤️💙💗

— Nicole Polizzi (@snooki) September 26, 2014

– Emily Strohm with reporting by Kristin Boehm