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Nicole "Snooki" Polizzi and Jenni "JWoww" Farley are back!

In the first trailer for their new MTV spinoff Snooki & JWoww, the reality stars embark on a new journey when they decide to move in together. Shortly after they find an apartment, however, Polizzi tells her roommate some shocking news: "I'm pregnant . . . and engaged."

After she processes the information, Farley, 25, accompanies her BFF and Jionni LaValle, 24, to Polizzi's first ultrasound. "Honestly I really didn't know that I could make a baby," Polizzi says, "so the fact that I can reproduce is very scary."

Though Polizzi's life took an unexpected turn, it didn't sour her friendship with her former Jersey Shore costar. "I would die for you," she tells Farley. "But let's make sure that doesn't happen."

"Me and Jenni have the rest of our lives to stick our heads up Jionni and Roger's asses," Polizzi, 24, adds. "I think right now is the prime time for us to be together and enjoy life as best friends."

Snooki & JWoww premieres June 21 at 10 p.m. EST on MTV.