Kim and Khloé Kardashian Gush Over 'Baby Bobby Boy' on Brother Rob Kardashian's 36th Birthday

Khloe Kardashian/Instagram Khloé Kardashian, Rob Kardashian and Malika Haqq

Rob Kardashian's big 3-6 was filled with affection, well-wishing and adorable throwback photos!

Kim Kardashian joined the "Happy Birthday" chorus as her younger brother celebrated another turn around the sun on Friday.

"Happy Birthday Robertito," she wrote on Instagram, adding in shamrock emojis for St. Patrick's Day. "I just love you SO SO SOOOO much!!! I wish I could post your singing voice notes on here to show the world your true talents 😂 BUTTTT swipe to the last one to hear Robbie speak fake Armenian. 😂 You make our entire family's days with you're silly messages! Not sure what I would ever do without you! 🍀 ♾️ 🎂"

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Khloé Kardashian posted the most in-depth tribute to Rob, starting off by saying March 17 is "one of my most favorite days because it's one of my Most favorite human being's birthday!! My baby bobby boy."

She continued, "My wish for you is a thousand wishes And for them all to come true. That you wake up one day and you know with everything inside your being that you are enough. You've always been enough. My wish is that you feel what anyone feels when they are in your presence, complete bliss and respect! You make people feel safe and that they are home when they are around you. I pray you realize that WE are the lucky ones because we have you. My wish for you, I want you to be happy. Deeply and sublimely happy. I want deep peaceful happiness to enter your life and for it to never leave your side. I wish for God to place a crown upon your head and that this crown cloak you in strength, grace and love."

"My wish is that you continue to do things that push you outside your comfort zone," she went on. "Let this season be what it needs to be. Let it shape you how it is destined to. Tell people that you love them, often, and that you appreciate them. Be the greatest person you can possibly be. Do things that make you proud. Surround yourself with people who bring out the best of you. Believe in yourself and in your journey. Continue to be humble, Let go of the pressure that your past has put on you. Thrive at your own pace. The secret is, just be better than you were yesterday. The desire is to Do it all for you and you alone."

She concluded, "Robert I couldn't be prouder to say I am your sister. I couldn't be luckier that I get to call you whenever I want about absolutely nothing. I thank God every day for our relationship and the relationship with our children. God always had a plan!! I thank God that you and I both have the weirdest humor. I couldn't be more blessed or excited that I have an entire lifetime with you! Genuinely you are one of the most loving, hysterical, gentle and majestic human beings I've ever known. Being your sister is an absolute privilege. I will forever protect you my beautifully brave brother. Happy birthday king."

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Kourtney Kardashian was among the first family members to send love to her baby brother on Friday.

The 43-year-old reality star posted a sweet throwback on her Instagram of herself and the youngest of the Kardashian clan dressed in full '80s gear, complete with bright colors and shoulder pads for Kourtney and a denim outfit and mini mullet for a toddler Rob.

"80s icons @robkardashianofficial," she captioned the snap.

She continued to celebrate Rob in her Instagram Story, posting another baby picture of her little brother with a simple red heart over the photo.

Kourtney Kardashian/instagram

Kourtney also reposted mother Kris Jenner's loving tribute, which was a video compilation of Rob through the years from home baby videos to his second-place finish on Dancing with the Stars.

"omg we're always together 🫶my little leprechaun!" Kourtney wrote above the video, another St. Patrick's Day nod.

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Kris, 67, wrote a touching caption below her video tribute, which consisted of a two minute long video with Frank Sinatra's "Fly Me to the Moon" playing in the background.

"Happy birthday to my amazing wonderful, beautiful son, Rob!" she wrote. "You are one of the most amazing humans I know in life. You are so kind, loving, smart, creative, generous, giving, and one of the nicest and most humble men I have ever known."

Kris Jenner/instagram

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She continued, "You are the greatest dad in the world! You are so amazing and fabulous with Dream! You make sure her every need and desire is taken care of constantly and you do it with such joy, passion, consistency, and love."

"Thank you Rob for all the passion, all the love, all the kindness that you give all of us every single day, I thank God every single day that he chose me to be your Mom," she concluded. "I am the luckiest mother in the world to have you as my son. I feel completely blessed, and I love you more than you will ever know. Mommy xoxo 🍀💚😍❤️🙏🏼 @robkardashianofficial"

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While Rob's other sisters have yet to post their love for their only brother on their social media, Rob did get a shout-out from Kourtney's ex Scott Disick.

The reality star and entrepreneur posted another throwback photo of the two matching in white button downs and black bow ties, with Disick, 39, smoking a cigar.

"Happy birthday Bobby," he wrote on his Instagram Story.