'Jersey Shore' Star Ronnie Ortiz-Magro Welcomes Baby Girl with Girlfriend Jen Harley
'Jersey Shore' Stars Film 'Family Vacation' In Miami

There's a new meatball in town!

The "Jersey Shore" crew keeps multiplying.

Ronnie Ortiz-Magro is the latest cast member to welcome a child, as his girlfriend Jen Harley gave birth to a baby girl on Tuesday, according to E!. The reality star reportedly skipped out on the show's London premiere so he could fly back to Las Vegas to be with her after learning her water broke.

A rep for Ronnie wasn't immediately available for comment.

This is their first child together, though Harley is already mom to 11-year-old son Mason. The arrival makes Ron Ron the fourth parent in the "Jersey Shore" cast, following in the footsteps of Nicole "Snooki" Polizzi, Jenni "JWoww" Farley and Pauly D.

"I couldn't be more excited to be taking this next step in my life," Ronnie exclaimed when the couple first announced that they were expecting.

A very pregnant Harley was spotted in Miami while her man was filming the upcoming season of "Jersey Shore: Family Vacation," which premieres Thursday night on MTV.

A proposal was teased in the latest promo -- think he's the one who popped the question too?

GTL 4 Life! Getty/Instagram T-Shirt Time! 'Jersey Shore: Family Vacation' Premiere Sightings