Kylie Jenner finally announced the safe arrival of her "healthy and beautiful" baby girl on Sunday, giving her followers a first look at her newborn and ending months of speculation over her pregnancy.
And as well as giving an insight into the blissful months leading up to the arrival of her daughter, the star's 11 minute birth announcement video also showed big sister Kim Kardashian's new baby Chicago for the very first time.
Kim and husband Kanye West welcomed their third child and second daughter via a surrogate last month, with the gorgeous baby girl seen being introduced to her pregnant 20-year-old aunt Kylie in the emotional video clip, according to the Daily Mail.
It was the first time the child has been shown since the 37-year-old reality star and 40-year-old rapper welcomed their new addition on January 15.
A proud Kim looked truly radiant as she gazed at her bundle of joy before handing her to an expectant Kylie, no doubt giving her some much needed practice before her baby girl's arrival.
A heavily pregnant Kylie swathed her blooming bump in a casual grey sweater and wore her raven locks in a casual ponytail as she expertly cradled the adorable baby, who was the spitting image of Kim's eldest child North.
Kim also went for a laidback vibe as she flaunted her cleavage in a tight black tank top paired with leggings, and sported minimal make-up.
Clearly enjoying the special time as a family, Kim smiled as she held her longed-for baby girl.
A besotted Kylie said "she's so little" before asking Kim "did you pick out the name?"
Revealing her daughter's unusual moniker Kim says "I think we're gonna call her Chicago," leading Kylie to gush "that is so cute, I love that."
In a bid to educate Kylie on the rigours of labour, Kim says that she needs to "school" Kylie on what her "vagina" is going to feel like, "like for real" as Kylie says "I don't want to know".
It truly was a family affair for the Kardashian-Jenners, with brother Rob, 30, also seen in the video with his 15-month-old daughter Dream, who he shares with ex fiancee Blac Chyna.
Showing the siblings have healed their feud, Rob is seen bringing over an adorable Dream to meet her baby cousin, before a besotted Kim lovingly strokes Dream's face.
Kylie welcomed her 8lb 9oz baby girl with rapper boyfriend Travis Scott, 25 on February 1. It was reported the pair had gone their separate ways before the birth, but the emotional clip appears to debunk that rumour.
The pair have been dating since April, with the pair going public with their romance just weeks after Kylie split from long-term beau Tyga, 28, and Kylie falling pregnant just one month later.
The beauty mogul and music star called time on their relationship in April after nearly three years of dating as she felt 'too young' to be in a serious relationship.
Tyga is also the father of a child, King, with Blac Chyna, the former fiancee of Rob Kardashian with whom she has a daughter, Dream.
The Automatic Bang rapper raised eyebrows back in September when he responded to speculation that Kylie was pregnant with a social media post reading "Hell nah thats my kid" (sic).
Kylie and Tyga kept their romance tightly under wraps until her 18th birthday with the news of a split coming as a shock to her millions of fans.
The reality star delivered her first child at the same hospital where Kim, Kourtney, and Rob welcomed their children: Cedars-Sinai in LA.
Kylie also revealed that it was her choice to keep the entire process a secret as she thanked her friends and family for keeping it mum.
She began the statement by writing: "I'm sorry for keeping you in the dark through all the assumptions.
"I understand you're use to me bringing you along on all my journeys. My pregnancy was one I chose not to do in front of the world."
Kylie also reflected on her experience carrying the child as she wrote: "Pregnancy has been the most beautiful, empowering, and life changing experience I've had in my entire life and I'm actually going to miss it."