No other details have been revealed. The 20-year-old has been sharing her post-pregnancy regime with her fans; it includes a lot of skinny-tea and waist trainers.
The couple, who began dating in 2016, were thrown even further into the spotlight yesterday when footage surfaced which appeared to show Tristan kissing a woman in a nightclub. While Kardashian initially had her heart set on having a boy, she quickly set the record straight on Twitter after the episode aired, writing, "I am now so excited my daughter will have forever best friends with Chicago and Stormi!"
It is Thompson's second child and the first for Kardashian.
Thompson's appearance comes after sources say he was cheating on Kardashian. She was subsequently identified by the Daily Mail and Page Six as an Instagram model and strip club bartender named Lani Blair.
Videos emerged on Tuesday, which apparently showed the sportsman being unfaithful as recently as last weekend. After seeing the shocking Tristan Thompson cheating videos that had gone viral, Kris and her daughters dropped all plans and headed for Cleveland in order to support Khloe.
A source told Us Weekly that a "remorseful" Thompson would like Kardashian to remain in Cleveland where he owns a $1.9 million, four-bedroom pad. "He's a serial cheater".
In a June 2017 episode of "Keeping Up With the Kardashians", she gushed about how she and Thompson had talked about starting a family together. But then again, I love being in L.A. because I get to see my sisters and my mom, and I have my trainer and the people that I've grown up with. "We could start at one and grow from there", Kardashian said.
Kardashian becomes the third member of her family to add a baby in 2018. Thompson is also dad to a 16-month-old son, Prince Oliver, from a previous relationship.
This story is developing.