The reality star added that her newborn son looks exactly like her third child Chicago.
Kardashian and West are understandably thrilled to have their fourth baby, with a source telling ET: "Kim and Kanye feel complete with the addition of their newest son".
He's here and he's flawless!
In one of the videos shared by Kim herself, the mum-to-be had revealed that she was freaking out before the birth of her son.
"He's also Chicago's twin", she tweeted.
On Thursday, Kim's sister Kourtney Kardashian spilled the beans about the arrival of her nephew while filming the "Ellen DeGeneres Show", which is set to air on this Saturday.
The new baby joins North, Saint and Chicago.
Rask impenetrable as Bruins advance
Columbus hit the crossbar three times: Pierre-Luc Dubois in the first period, and Dean Kukan and Josh Anderson in the second. The seven-game series already has a rivalry off of it, between media members of the Bruins and Hurricanes.
"Happy Mother's Day to all of the handsome Moms out there, and to the women who are mentors and mother figures to someone special", Kris wrote on Instagram, sharing an album of photos of women in the family.
He is also the second baby the couple has welcomed via surrogate, or better still, a gestational carrier.
Kim told him: "I actually do not".
Then the star chose to add that little as two drops of water similar to her daughter and her sister to Chicago. "So I'm a little annoyed".
"When you have surrogate, for me, I realized that having a baby shower for [Chicago] was actually so much more beneficial for my kids, because they saw people come", Kardashian said in an interview with PEOPLE.