Kris Jenner's only son turned 31 on Saturday, and she couldn't help but celebrate with a sweet collage of photos.
"Happy birthday #robkardashian!! You are the most wonderful son a mom could ever ask for and I thank God for you every day!" Kris wrote alongside the pics, which feature moments from Rob's childhood, a more recent birthday, and a shot of Kris and Rob with his daughter, Dream.
"It brings me so much joy to see the incredible father you have become. I am so proud of you!!" she continued. "Love, Mommy x #HappyBirthdayRob #ProudMama."
Rob didn't just get a shout out on Instagram for his big day. As Kourtney Kardashian showed off on her Instagram Story, the reality star was treated to a huge display of balloons reading "Happy birthday Rob."
Kendall Jenner also celebrated her big brother, sharing a throwback pic of herself and Rob, writing, "birthday boy bobby," while Rob shared a sweet snap of Dream.