Kim Kardashian and Kanye West welcomed Saint in December 2015.
Saint West turned two years old on Wednesday, 5 December. And, proud mother Kim Kardashian took to social media to celebrate her son's birthday.
The TV personality has shared an adorable photo of her little boy on Instagram. Rocking his braid, Saint is seen gazing into the camera while wearing just jeans and holding onto his toy with his right hand.
"HAPPY BIRTHDAY to my beautiful boy Saint! I love you so much! You don't even understand!!!" she wrote alongside the photo of her son.
Kourtney Kardashian and Kris Jenner took to the photo-and-video-sharing application to share the photo and wish the birthday boy.
"Happy Birthday my little Sainty boo. DAY 5 . 25 DAYS OF CHRISTMAS," Kourtney wrote next to the photo, while Kris said, " Happy birthday to our little angel Saint!! ❤️ #HappyBirthdaySaint #SaintWest #Family #Love."
The photo has sparked a meltdown, with one fan saying, "Cutest one of them all looks like his momma", while another added, "He is so cute... kim mini me."
As Christmas is around the corner, an admirer took the opportunity to say, "Happy holidays to you and your family one love", while someone else wished the little body, saying, "Happy Birthday baby Saint! You are gorgeous."
Kim and husband Kanye West welcomed Saint in December 2015. The couple also share four-year-old daughter North West and are expecting a girl via surrogacy around the holidays.
Prior to posting the photos, Kim and Kourtney threw a Monsters Inc-themed birthday party for Saint, and Kourtney's son, Reign. Kourtney and ex Scott Disick are parents to Reign, who turns three on 14 December.
Reign and Saint were treated to an epic bash, which included an ice rink, fake snow, and a special visit from Santa, according to Us Weekly.
Kim has shared a video of West, 40, leading Saint and their daughter North, 4, towards the ice rink. She also shared a snap of the cakes, featuring the characters from the 2001 animated movie Monsters, Inc.