The former stripper took to social media to send her note out as she shared an old image with Rob and Dream, who is aged one, via her Instagram.
Both Kim and Kris were producers on the show.
Her message read: Happy Birthday Rob From Dreamy and Chy.
Chyna filed a restraining order against Rob after he posted naked images of her on the Internet nut they are now co-parenting their daughter Dream who was born on November 10, 2016.
As he celebrated his birthday today Rob also got a message of support from his mother Kris Jenner.
She wrote on her Instagram: Happy birthday #robkardashian!! You are the most wonderful son a mom could ever ask for and I thank God for you every day! It brings me so much joy to see the incredible father you have become. I am so proud of you!! Love, Mommy x #HappyBirthdayRob #ProudMama
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