The 15-year-old reality star scored the cover of American Cheerleader magazine, and her sisters are beyond thrilled! Khloe Kardashian couldn’t help but share the news on her blog, writing:

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“Hi dolls! As the proud big sister that I am, I of course had to post Kendall’s very FIRST cover! WOOOHOOOOOOOOOOO! She absolutely loves cheerleading at her school so I know this magazine meant a lot to her :) Can you believe how stunning she looks?! I mean, what is going on here??? I used to change her diapers! LOL. Congrats Kenny!!!! I die for you.”

Meanwhile, Kendall’s big sis Kim has been disclosing pics from her latest cover girl project. The reality star gave her fans an inside look at her steamy photo shoot with Cosmo UK, showing off photos from the magazine that leave little doubt that these sisters know how to turn some heads!