By Us Weekly
Bump's out, and Kristin Cavallari's proud! The former "The Hills" star took to Instagram on Saturday, Jan. 18, to show her second pregnancy's progress in an all-black workout ensemble.
PHOTOS: Kristin's chic pregnancy style
"Gym selfie...baby bump getting big!" she captioned the picture.
The shoe and accessories designer recently celebrated her 27th birthday with hubby Jay Cutler and a "mocktail." The couple, who wed in June 2013, are already parents to son Camden, 17 months.
PHOTOS: Kristin Cavallari's life as a mother
Cavallari told Us Weekly that for Christmas, their doctor put a note with their second child's gender in it, and they opened it on the holiday. But they have since remained silent about the child's gender on social media.
PHOTOS: "The Hills" stars, then and now
In September 2013, Cavallari told Us Weekly, "I would love to have a little girl, but if i had another boy, that would be great too."
Click on for more photos of K-Cav and her beautiful family...
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