Looks like it's Kourtney Kardashian's turn to post a bikini pic!
Following in the footsteps of Kim Kardashian, Kris Jenner and Kylie Jenner, Kourtney is the latest to put her beach bod on display ... but hers comes with a little something extra.
Yep, her baby bump!
"Sundayzzzz," the expecting reality TV star wrote, along with a fun photo of herself and her friends jumping into a pool.
The 35-year-old beauty revealed that she's expecting her third child with Scott Disick during the season premiere of "Keeping Up With the Kardashians."
During one scene, Kourtney is shown telling Scott that she was pregnant as she sat in her closet -- and Scott's reaction is priceless! Check out the clip above.
The couple is also parents to Mason, 4, and Penelope, 23 months -- so that means a baby soon makes five!