Multiple sources have confirmed Kardashian's pregnancy to Us Weekly adding that she's "only a few months along."
Kardashian and Disick are already parents to Mason Dash Disick born in December 2009 and Penelope Scotland Disick born in July 2012. The couple has been together -- on and off -- since 2007. The pair's multiple breakups and makeups have often been documented in the reality show Keeping Up With The Kardashians and in several of the show's spin-offs.
Insiders say the upcoming baby "was planned" because Kardashian "wants to have a handful of kids."
"I need to see what it's like when I have two, but [having kids] is what life is about," Kardashian said in a 2012 episode of KUWTK. "I'm not going on the pill. I don't believe in it anymore!"
Kardashian is reportedly due in December.