Pregnant Kim Kardashian is currently on vacation in St. Barts for a little R&R, and the 34-year-old showed off her burgeoning baby bump during a water workout with the rest of the Kardashians on Aug. 18!

pregnant kim kardashian

kim kardashian baby bump 2

The mother-of-one, who's a fan of wearing black, took her look to the next level in an athletically chic ensemble, which included a black sports bra with matching leggings.

Click through the gallery above to see all of the star's maternity outfits so far!