Jenni "JWoww" Farley pregnant with first child

The "Jersey Shore" family is getting a new addition.

Jenni "JWoww" Farley is expecting her first child with fiance Roger Mathews.

The pair broke the news with an announcement posted on Farley's website on Christmas Day.

"Merry Christmas from within! Roger and I couldn't have asked for a better Christmas gift this year! We wanted to share this exciting news with you all first because you have been a part of our lives these past few years and seen the love between Roger and me develop and blossom," she wrote. "We are so excited to share this new chapter of our lives with you as we become parents and create more memories with a new addition to our family! Thank you for all your love and support and for being there for us throughout the years! We are extremely happy and cannot wait for our bundle of joy to arrive! Happy holidays from our growing family to yours!"

Farley, who stars with "Jersey Shore" pal Nicole "Snooki" Polizzi on MTV's "Snooki & JWoww," got engaged to Mathews in September 2012.

Polizzi, who has a son of her own, took to Twitter to react to Farley's baby news.

"IM SO EXCITED MY BEST FRIEND @JENNIWOWW IS PREGNANT! Finally we can be MOMS together," she wrote. "Love you boo! I got you."

Farley will be the third "Jersey Shore" star to become a parent. Polizzi and fiance Jionni LaValle welcomed son Lorenzo in August 2012, and Paul "Pauly D" DelVecchio revealed in October that he now has a daughter.