The "new girl" -- who memorably bonded with Kristin Cavallari and the rest of the senior LBHS gals during Season 2 of the hit MTV series -- is expecting her first child with husband Sean Brown, the mama-to-be shared on her Instagram account.
"We are SO thrilled to announce we are having a baby!!!!" the future parent captioned the heartwarming snapshot above, which finds Casey's burgeoning belly front and center. "Life is truly so beautiful and exciting for us right now! We feel beyond blessed and so incredibly excited!"
Casey's adoring husband also uploaded a beautiful image with his pregnant wife.
"All of my dreams came true," he added. "I love you @caseycupcakequeen thank you for making me a father."
The Casey's Cupcakes founder, who did not disclose her due date or the bundle of joy's gender, is not the only member of the Class of 2005 who is set to give birth in the not-so-distant future: Alex Murrel will welcome a baby boy, she announced several weeks back.
Share your well wishes for Casey and her expanding brood in the comments!