Jersey Shore's Vinny Guadagnino initially worried co-star Snooki's baby was his.
The 24-year-old former party girl - whose real name is Nicole Polizzi - is expecting her first child with fiance Jionni LaVelle, but after she enjoyed a brief fling with her fellow cast member on the MTV reality show, Guadagnino was worried he could have fathered the tot.
Jersey Shore's Pauly D joked: "He's counting the months. At first he was, but then he's like, 'It's no way in the world, it's no way. It's gotta be Jionni's. It's gotta be.'
"Aw, man, congratulations Vinny."
The 31-year-old DJ - whose real name is Paul DelVecchio - vowed to "spoil" Snooki's tot and even wants to be in the delivery room when she gives birth.
Pauly D said in an interview with MTV News: "I'm real excited. I love babies. I love everything about them, when they're not yours. So I'll take care of it, spoil it and then when it's crying, give it back to Snooki.
"She's excited. She loves it. She's always wanted kids. I want to be at the delivery room."
Snooki discovered she was pregnant at the beginning of the year and was initially worried because she had been drinking on New Year's Eve, unaware she was expecting.
She told US Weekly magazine: "We found out right after New Year's. My first thought was, 'S..t, I've been drinking.' I was worried. It was New Year's Eve and we were in Vegas, so I did go crazy."