The father of Khloe's daughter and her boyfriend of over a year, Tristan Thompson, was reportedly present in the delivery room as well - despite allegations that he cheated on Khloe throughout her pregnancy with multiple women.
Oldest sister Kourtney, 38, posted a "girls rule" pic to her Instagram of her daughter Penelope, 5, and niece North, 4, giving the arm muscle motion captioning the photo, "Girl Power".
Kris is officially the first member of the Kardashian crew to publicly comment on Khloe's bundle of joy.
Kardashian West, who has three children - daughters North and Chicago and son Saint - with rapper husband Kanye West, says that she "can't wait for our baby girls to grow up as best friends the way we are!"
Keeping Up with the Kardashians has turned Khloe Kardashian, her five siblings and mother into some of the most influential celebrities with massive social media followings and multi-million dollar fashion, beauty and other businesses.
Man Utd midfielder Herrera lifts lid on Mourinho management
Ahead of Sunday's game with West Brom, Mourinho says he has told Pogba he wants to see greater consistency from him, particularly in training. "And the past two, three weeks I'm really happy with him".
"You guys she's so gorgeous", she added. She isn't even mad at Tristan'.
Kim Kardashian and Khloe Kardashian.
Clearly in the throes of love, Younes placed a tender hand on his girlfriend's lower back as they prepared to head into the event. But despite the rumors, a source told People that reality star "is feeling nothing but happiness right now", and "absolutely nothing else matters".
Kardashian's family, including mum Kris Jenner, sisters Kim Kardashian West and Kourtney Kardashian and her best friend Malika Haqq were apparently present for the birth, after flying directly from Los Angeles following the release of video footage of Thompson kissing another woman in NY.
A source said: "Immediately after [the birth], she plans on leaving Cleveland and never returning". As such, Khloe's baby girl appears to have been born amidst the tumult of a public scandal - true to the ever popular Kardashian brand.