Kendall and Kylie Jenner may live the most luxurious teenage lifestyles out there, already having accomplished more things in the business world than most do in their lifetimes, but they now have a huge reason to be celebrating because they both have graduated high school!

The Jenner sisters were thrown a huge surprise graduation party by the entire Kardashian clan on Thursday night, and it was hosted by none other than Ryan Seacrest, who is executive producer of their reality show "Keeping Up With The Kardashians," according to E! News. As per usual, the family posted a ton of photos from the event to social media, and it seems like everybody had a blast! Kendall graduated last year, and Kylie graduated just a few days ago, but they were both honored in this celebration at their mom Kris Jenner's Calabasas, Calif., home.

Kylie's rumored boyfriend Tyga was in attendance along with big sisters Khloe, Kourtney and Kim Kardashian, and even their good friend Gigi Hadid. Kylie kept all her followers updated on the entire event on her Snapchat, showing off her two graduation gifts, a $7,000 Cartier bracelet and a Rolex watch, plus a few videos of Khloe twerking. The Jenner sisters, surprisingly, wore very causal outfits consisting of jeans and tank tops while Kylie decided to rock a graduation cap for most of the night.

"I love my mom for doing this," Kylie captioned a photo of herself holding up her diploma. "Thank you for making this experience as normal as possible for me. Yay I graduated :)"

Kim shared a ton of black-and-white photos from the photo booth, some of which included her husband Kanye West and their daughter North West. The first one, which was of all five sisters, was captioned, "Graduating class of 2014 & 2015. Congrats @kendalljenner & @kyliejenner for graduating high school! #SurpriseGraduationParty!" She also posted another with Seacrest, thanking him for hosting the special night. Seacrest shared his own selfie with the graduating girls, writing, "just had the honor of hosting @kendalljenner @kyliejenner's graduation. Congrats proud of u."

Check out all the awesome photos below and congrats to Kendall and Kylie!