The couple's second child and first son, Saint, was born on Dec. 5, 2015. When Kourtney Kardashian surprised Kris Jenner on The Ellen DeGeneres Show with the news that Kim's surrogate was in labor with her fourth child, Saint was adorably shy when Ellen asked him what his name was.
For his fifth — and golden! — birthday, Kim shared a message for her son, calling him "one of my life's soul mates." "My baby Saint turns 5 today," she wrote. "Every year I interview my kids and ask them the same exact questions about life. Saint- I can't wait to see how you've grown and how you answers these questions as a 5 year old and show them to you when you're big. I know a drive- by party isn't ideal but it's our times and you are so excited! You are always so joyful and bring so much joy into my soul every single day. You will always be my baby boy. Enjoy your golden bday this year Sainty!"