The power couple selected a San Diego mother in her late 20s to carry their baby who they found via an agency, Us Weekly reports.
This could mean that North and Saint West should have a little brother or sister in February 2018.
According to TMZ, the couple will pay the surrogate $US45,000 ($59,000) in monthly instalments to carry their baby.
Following the birth of Saint, Kim spoke candidly on Keeping Up With the Kardashians about wanting another baby, however, the reality TV star had been diagnosed with placenta accreta, which meant a third pregnancy would pose an extremely high risk to her health.
"I can’t carry anymore kids … it’s the worst," she said on the show. "It’s not going to be happy for me.. I had a full break down … I give up."
"So now I want to explore surrogacy."
Kimye are yet to make an announcement - but stay tuned!
A version of this article originally appeared on Girlfriend.