Jenni Farley, a.k.a. JWoww of
"Santa brought me and Roger the best gift of all," she wrote in the post.
"Happy Holidays from our growing family to yours! Love Jenni, Roger and, arriving July, 2014, baby Mathews," the card says.
Farley, who would then be about three months pregnant, elaborated on the announcement on her blog.
"Merry Christmas from within!" the 27-year-old wrote. "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."
"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 and Matthews announced their engagement in September 2012 after two and a half years of dating. Rogers popped the question while the couple went skydiving and presented Farley with five-carat-plus cushion-cut diamond surrounded by 2.5 carats of smaller diamonds, some of them pink.
Perhaps the mom-to-be solicited some advice from her "Jersey Shore" and "
"Lorenzo was and is perfect," JWoww wrote about the 1-year-old.
"So will urs," Snooki responded. "Sleep safe, keep hydrated, no
"Yes mom!" JWoww joked.
Farley's petite former roommate seemed elated by the news and took to Twitter to make her own version of the announcement.
"IM SO EXCITED MY BEST FRIEND wrote. "Finally we can be MOMS together love you boo! I got you."IS PREGNANT!" Polizzi
Their costars from the hard-partying MTV series also offered congrats online.
"I am so beyond excited for such an amazing great couple tweeted Sammi "Sweetheart" Giancola.& !! Congrats love you!,"
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