Happy Birthday Rob Kardashian!

Kris Jenner is really, really proud of her son Rob Kardashian. On Tuesday, March 17, Kris took to Instagram to wish Rob a happy birthday and posted a photo of him captioned, "Your smile can light up any room and a million hearts @robkardashian. I fell madly in love with you the moment we met 28 years ago. You are such a joy, with the biggest heart I have ever known. God blessed me with an amazing son and I cherish every single day and memory we have."

As Us Weekly points out, Rob hasn't been in the public eye as much lately due to an ongoing struggle with "self-esteem issues." In addition, Rob didn't appear on the Season 10 premiere of Keeping Up With the Kardashians on Sunday, but hopefully he'll be back soon!

That said, his family rallied around in support on his 28th birthday. Khloe Kardashian had some especially sweet words for her younger brother, writing, "Happy birthday @robkardashian!!!!!! Never will I ever meet another man as great as you! I know this is the year where you will find your happiness again! I will be right by your side, holding your hand, every step of the way!!!" You see, you're never too old or too famous to be a little brother.

Kim Kardashian, Kendall Jenner, and Kylie Jenner also reached out to their brother to wish him well and shared some adorable throwback photos. Here are the cutest we've seen so far: