Khloe and Kim Kardashian Credit: Instagram

Add Kim Kardashian's stomach to the list of things that go bump in the night. Three months into her pregnancy, the E! reality star is suddenly showing -- and showing off! On Thursday, Jan. 31, the 32-year-old first-time mom-to-be posted a picture of her brand-new belly on Instagram, along with the caption "Well hello there! #PoppedOuttaNowhere!!!"

The snapshot, which was taken during a photo shoot with Kourtney Kardashian and Khloe Kardashian-Odom for the girls' Sears clothing line, shows Kim facing sideways as Khloe lifts the peplum waist on her sister's skin-tight black dress to reveal a very visible bump. Both ladies look super glamorous -- Kim, in particular, is positively glowing. Her dark hair is swept to the side in thick cascading curls, revealing her high cheekbones and smoky eyes.

Khloe's look is more playful -- she holds a phone to her ear while blowing a kiss at the camera -- but equally stunning. She too wears a body-hugging black dress, paired with a brown cardigan and black pointy-toed pumps.

Kim has been proudly showing off her evolving curves ever since boyfriend Kanye West announced in December that the Kourtney & Kim Take Miami star was pregnant with his baby. Earlier this week, she flaunted her growing bump during a late-night visit to the gym. (Kim has been working with celeb trainer Tracy Anderson on a special prenatal workout plan.) And last week, in Paris, the expectant mom showcased her bod in a dramatic white dress embellished with feathers -- and some $65,000 worth of jewelry from West, 35.

"He is so excited," she gushed of her rapper beau's attitude toward fatherhood. "It's really cute how excited he is."