The pair selected a San Diego mother in her late 20s to carry their baby who they found via an agency, Us Weekly reports.
Sources have claimed that they will pay the surrogate $US45,000 ($59,000) in monthly instalments to carry their baby.
And in the latest Keeping Up With The Kardashian teaser, the mother-of-two (soon to be three!) officially confirmed the news.
“What happens every time I say, ‘Guess what?'” Kim, 36, asks sister Khloè on the phone.
“The person’s pregnant?” Khloé, 33, responds.
Kim's announcement comes just days after news of Khloè and Kylie's pregnancies went live.
SAH many Kar-Jenner bbs on the way!