KHLOE Kardashian shared an emotional message to her reclusive brother Rob to celebrate his 35th birthday.
The KUWTK alum, 37, called her younger sibling her "best friend" and praised his "gentle and hysterically silly spirit".
Khloe shared a slew of throwback photos and videos with Rob to commemorate his big day on Thursday.
In the lengthy caption, she wrote: "Happy birthday to the best brother in the world!!! My little leprechaun my Ace in life!
"You’ve been my best friend since the minute you were born and sorry to break this to you but we will Be best friends until the end of time, through every lifetime. You’re stuck with me kiddo."
"I hope you know how dope you are. You’re one of my favorite people on this planet. I want you to know how honored I am to be your sister.
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"I would do anything for you! You are my best friend! Truly, you’re The funniest guy I know!"
Khloe went on: "Never change your gentle and hysterically silly spirit!! 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 mother-of-one concluded: "You’re a special kind of guy @robkardashianofficial. I love you forever and always Bobby boy!"
Their sister Kim also took to Instagram to mark Rob's milestone day, sharing a throwback photo of them on a jetski as kids.
She wrote: "I love you so much Robbie! Happy Birthday @robkardashianofficial. Words can’t even describe how special you are!
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"Not only are u the funnest human being but just the best human being! You’re always down to get Covid shots together then freak out for weeks debating if we’re dying!
"You’re always down for a good movie night then never show up! LOL I love how our daughters are besties! Seeing u be the best dad makes me so happy!
"Dream is so lucky to have you just like we all are! I knew you would be our good luck charm being born today."
FAMILY MAN
Rob shares his daughter Dream with his ex Blac Chyna, while Kim is mom to daughters, North, eight, and Chicago, four, as well as sons Saint, six, and Psalm, two, with her ex Kanye West.
Unlike his famous family members, Rob prefers to stay out of the limelight and isn't super active on social media.
He suffers from diabetes and has had numerous hospital visits since his diagnosis in 2015.
Rob has struggled with his weight for years and is believed to have weighed almost 300lbs at his heaviest.
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Rob also chose to not film the later seasons of the popular E! show while he dealt with his health issues.
It was recently revealed that the father-of-one will not appear on camera in the family's upcoming Hulu series: The Kardashians, as well.
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