The 35-year-old star, who has two kids with husband Scott Disick, will reveal the news to him as seen in the preview of the show 'Keeping With Up With the Kardashians', reported Us magazine.
The two are shown talking in their walk-in closet when she says, "I'm pregnant." And Disick's reaction is, "What? Holy!"
The couple do not know the gender of the baby and just wishes the child to be healthy.