A little brother will soon be joining North West.
"Precious moments like this when we were traveling on tour with you are what I live for. You're such a good daddy to North & you will be the best daddy to our new son too!" she shared on Sunday, next to a picture of Kanye West with his 2-year-old daughter North.
She also shared a picture of West kissing his beloved little girl.
"I'm so lucky to be married to a man who is so in love with his daughter, your bond is so irreplaceable! Thank you for being such a good dad! We love and appreciate you so much! We're so blessed to have you!"
The news of having a boy comes just a month after the news broke at the end of May, the couple were expecting yet again.
The news was announced on her reality TV show, "Keeping Up with the Kardashians."
"I just got the blood test back, and I am pregnant," she said in a preview for a future episode of the show.