“Happy birthday, Khloé! I'm so proud to call you my sister! You are one of the strongest, most determined people I know, and I love going through life together,” Kim Kardashian West shared on her app, along with a TBT pic of the two as children. “Thanks for being my best friend and the best Auntie Koko to my babies!”
Kris Jenner couldn’t help but gush over her baby daughter. “Happy birthday my beautiful bunny @khloekardashian!!! You are the kindest soul with the biggest heart and I am forever grateful God blessed me with you,” she wrote on Instagram, along with a photo collage of Khloe throughout the years.
“You are so funny and make everyone laugh and continue to bring incredible joy to everyone around you.... you are so smart and are the best daughter, sister, friend, auntie and girlfriend any of us could ever ask for... truly beautiful inside and out!” she continued. “I love you more than you will ever know my bunny... Mommy xo #HappyBirthdayKhloe.”
Kendall Jenner and Kourtney Kardashian also shared sweet birthday tributes via their apps.
“Happy birthday, Khloé! I hope you have the best 21st birthday yet, lol. I love you!” Kendall wrote.
“That time Khloé posed naked and totally owned it!” she began. “That time Khloé made me want to trade every little black dress I own for RED! That time Khloé wore a latex dress like it was no big deal! That time Khloé looked like a boss and wore a lace body suit to the Good American launch party! That time Khloé took high-waisted swimwear to a new level!”