Kim posted a polaroid-style snap of her mum Kris striking several stunning poses and wrote her a touching birthday message: "Happy Birthday to my fabulous mom! You are my best friend, the strongest person I know, you love so hard & are the most supportive woman on the planet! I hope today is filled with lots of ❤ & joy! @krisjenner I LOVE YOU."
A couple of hours later Kim took to Twitter again to announce that the Kardashian-Jenner clan were celebrating with "Cake cake cake". The reality TV star posted a link to a video of Kris sitting before a tremendous birthday cake with a picture of herself on the top.
The delighted mum is seen sitting at a table in a restaurant laughing happily before saying, "Now that's a beautiful cake."
Khloé also took to social media to pay a tribute to her mum on her birthday.
The 29-year-old had created a montage especially of several shots of just mother and daughter together – free of the rest of the numerous family members. "Happy birthday mama!!!" wrote Khloé on Instagram. "No one loves us like you do. No one believes in their children like you do. No one is as crazy as you to have so many kids pester you every hour of everyday."
Khloé goes on: "My point is, there's no one like you. Thank you for loving us all endlessly, for teaching us everything wonderful, for always being there no matter what any of us are going through and most of all.... Thank you for FAMILY. Happy birthday mama/momager/KrisJenner."
Sister Kendall dipped further into the photograph archives for her photo compilation. The pretty brunette, who celebrated her own birthday on Sunday when she turned 18, posted a compilation of several sweet snaps including two of Kris as a new mum with Kendall when she was a newborn.
Other adorable pictures include Kris with Kendall at bath time, and Kris and her husband Bruce, from whom she recently separated, with Kendall as a little girl, dressed in a pink dress and a pink bow on her head.
"Happy birthday mom!!! you're the best mom/ momager ever and I wish you the best birthday! ❤️ you deserve it! love you foreverrrr."
Kourtney got involved, too. "Happy happy birthday to my mommy! Thank you for inspiring and teaching me so much. You are the best mother and friend. I love you! Shake it like a Polaroid pictur," wrote the 34-year-old.