"Happy birthday to the best brother in the world!!!," Khloé began the lengthy note, while emphasizing how Rob has been her "best friend" since the "minute he was born."
"I hope you know how dope you are. You’re one of my favorite people on this planet," the Good American cofounder wrote of her baby brother. "I want you to know how honored I am to be your sister. I would do anything for you! You are my best friend! Truly, you’re The funniest guy I know! Never change your gentle and hysterically silly spirit!!"
Khloé wrapped up the heartfelt message by telling the Rob & Chyna alum to "Continue to find your best self. Continue to keep your head held high as you find your way through this insane life. Continue being the best daddy you can be."
The loving post wasn't the only update the Strong Looks Better Naked author gave her 226 million followers in one day, as Khloé showed off her toned body before an early morning workout. The mother-of-one flaunted her fit physique in a light blue two piece set, as she broke a sweat on the stair master.
Khloé — who shares 3-year-old daughter True with ex Tristan Thompson — has been making sure she's taking care of her mind and body following the Sacramento Kings player's very public infidelity. As OK! previously reported, Tristan conceived a child with fitness instructor Marlee Nichols in March while he was still in a relationship with the reality star.
"Khloe has been spending time with her sisters and family, working out, eating healthy, and focusing on her mind, body and soul," an insider spilled to the outlet following the jaw dropping scandal. "She's getting back on her A-game."