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By Marc Malkin
Jennifer "JWoww" Farley, left, and Roger Mathews arrive at the MTV Movie Awards on Sunday, April 13, 2014, at Nokia Theatre in Los Angeles.Jordan Strauss / Today

JWoww is a mom!

E! Online exclusively revealed that the former "Jersey Shore" star (real name, Jenni Farley) gave birth to her and fiance Roger Mathews' baby girl on Sunday, July 13 at 12:49 p.m. ET.

"Jenni and Roger are so excited to welcome the newest guidette Meilani Alexandra Mathews to the world weighing seven pounds and 13 ounces," says a rep for JWoww. "Meilani and her parents are doing great and are happy and healthy. Meilani is already looking to trade her baby bottle for barbells."

MTV said in a statement, "We're fist pumping in celebration of Jenni 'JWoww' Farley and Roger Mathews' new baby girl Meilani Alexandra Mathews. We're so excited for the new parents and to welcome the newest member to the MTV family."

On Tuesday, July 8, JWoww shared a selfie of her baby bump on her personal blog in a post entitled "My Last Week," writing "... It better be!!! Can't wait to meet my baby girl!!"

While she had a baby shower in May, her bestie Nicole "Snooki" Polizzi (who is pregnant with her second child) surprised her with another one on Monday.

It was a mini-Jersey Shore reunion of sorts with Sammi "Sweetheart" Giancola and Deena Cortese in attendance.

VIDEO: Pauly D talks fatherhood and JWoww's pregnancy

Snooks posted a photo of the group on Instagram and wrote, "Friends forever at @jennijwowwmtv 's baby shower! #pregobffs,"

JWoww announced she was having a girl in January.

Before announcing the gender of her baby, the 27-year-old offered a little teaser on her website by posting a sonogram picture of her baby lifting weights.

"LOL! Just kidding, but this is kind of perfect!" she captioned the sweet snapshot.

Mathews popped the question in September with a 5-carat ring surrounded by 2.5 carats of pink and white diamonds.

PHOTOS: Celeb baby bumps 

Ever since the MTV show debuted in 2009, the reality stars have shown up everywhere, from the New York Stock Exchange to “Dancing With the Stars” and now Italy.