The 33-year-old (real name Paul DelVecchio) revealed his happy news to TMZ, describing himself as a "proud father" and also admitting that he cannot wait to get stuck into this new chapter of his life.
His daughter is now a few months old and lives with her mother, who he has not named.
Pauly met the 25-year-old mother of his child in Las Vegas after travelling there for a DJ gig.
The pair hooked up during his Sin City trip and, following a paternity test, Pauly was delighted to learn that he was the baby's father.
Pauly D isn't the only Jersey Shore star who has become a parent recently.
Nicole 'Snooki' Polizzi also has a child, 14-month-old Lorenzo, with Jionni LaValle.
Snooki and fiancé Jionni LaValle welcomed their son into the world last August, and they are excited that little Lorenzo now has a fellow Jersey playmate.
In a statement to Us Weekly, Snooki said: "Now Lorenzo has a girlfriend!" She added that Pauly will make a great dad.
Check out who else has welcomed a baby into the world this year:
Copyright: Love & Lust London