The 26-year-old reality star says in an interview Friday with Us Weekly: "I'm due in the fall around my wedding time. Busy year!" The pregnancy was confirmed by her publicist.
Polizzi and her fiance, Jionni LaValle, are the parents of a 19-month-old son, Lorenzo.
Polizzi appeared on MTV's "Jersey Shore," a show about hard-partying Italian-American friends.