Kylie Jenner, 17, who revealed she graduated through Twitter on Tuesday, celebrated her achievement with family and friends on Thursday night in typical Keeping Up with the Kardashians fashion.
Kylie's sister, Kendall Jenner, who graduated in 2014, was also honored in the celebrations thrown at mom Kris Jenner's Calabasas home.
"Thank you for making this experience as normal as possible for me," Kylie wrote on Instagram, sharing a cap and gown photo. "Yay I graduated."
In the image, Kylie proudly displays her high school diploma, peeking out from behind the certificate in her black graduation regalia.
Kylie documented the fun celebrations through video sharing app Snapchat, which were in turn reshared through Instagram account Kylizzlesnapchats. In one video, the teen and Kendall, 19, are shocked to see a full house and festive balloons when they arrive at their mother's home.
"What is happening?" Kylie can be heard saying as the camera sweeps the room. "This is so crazy!" (Spotted: Khloé Kardashian's rumored boyfriend James Harden).
The impressive guest list included Kylie's boyfriend Tyga, model Gigi Hadid and even Ryan Seacrest.
In addition to the popping dance floor, entertainment included a synchronized swimming performance and a photo booth.
The selfie enthusiasts couldn't resist posing for a few black and white pictures in the booth, sharing the results on Instagram.
"Graduating class of 2014 & 2015," wrote stepsister Kim Kardashian West, sharing a photo with both Jenner girls and her other famous siblings. "Congrats @kendalljenner & @kyliejenner for graduating high school! #SurpriseGraduationParty!"
In the in the snap, Kourtney Kardashian, Khloé and Kim pucker up and strike a silly pose with their younger sisters.
Kylie Jenner's Snapchat Slip-up
"I know you graduated last year but so proud of you!!!! Class of 2014," wrote Kim of a pic with Kendall, using the hashtag "#SurpriseGraduationParty."
The KUWTK stars kept the party going and the dance floor moving all night long, capturing every moment on social media.