"I have some amazing news to share with you all," the reality star said on her website. "Kourtney and Scott are expecting their second child!"
"This is such a blessing and the whole family is beyond thrilled," she adds. "I just know Mason will make the best big brother and I can't wait to meet my new little niece or nephew!"
The news comes just days after Kim gave a depressing interview for the December issue of Glamor Magazine -- saying, "Maybe I'm not supposed to have kids and all that." She has been vocal in the past about wanting children.
So far -- the family is relishing the break from Kim's divorce drama. Mom, Kris Jenner even tweeted about whole thing, saying, "YESSSSSSSSSS Kourtney Kardashian is PREGNANT!!!!!!!!!! Wooohooo so excited and blessed!"