Jwoww posted a sweet picture to her Instagram account showing Ronnie gazing down at her five-week-old daughter Meilani.
She added the caption: "Hey uncle Ronnie."
Jwoww gave birth to her first child with fiancé Roger Mathews on Sunday, 13 July. She weighed in at 7lbs 13oz.
Ex-Shore castmate Ronnie hung out with the tiny tot just before the premiere of Jwoww's latest project, Jersey Shore Masacre, a horror movie which she executive produced.
Later that night, he walked the red carpet with Jwoww in Manhattan, while little Meilani stayed home with her daddy Roger.
Jwoww is the third member of the Jersey Shore family to have a baby. Nicole Polizzi – aka Snooki – is mum to son Lorenzo, nearly two, and pregnant with a baby girl, while Pauly D became a dad to daughter Amabella last year.
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