Kim Kardashian and Kris Jenner Post Sweet Messages on Saint West's 4th Birthday

Kim Kardashian celebrated her son Saint's birthday with some touching words and a heartwarming picture of the tot. Kris Jenner also shared a birthday post.

Saint West is already four years old, and the matriarch of the Kardashian clan can't believe it. Kris Jenner, 64, Kim Kardashian, 39, both took to Instagram to honor Saint on Thursday.

Kim shares Saint and their three other children, North, six, Chicago, one, and Psalm six months, with husband Kanye West. Her post is found below.

Kim celebrates Saint's birthday

In Kim's snap, Saint is wearing a patterned light pink shirt and a chain with a cross around his neck. He smiles brightly into the camera and has his brown, curly hair let loose.

The reality star showered love on her first son in the caption, talking about his smile and his curls. She further let her followers know that Saint calls her his "sweet sweet sweet sweet Momma."

Khloe wishes Saint Happy Birthday

"How can you not melt at this sweetness?" she went on to ask. Her sister Khloe Kardashian left a sweet comment. "So precious!" she wrote using her Good American brand account.

Saint's grandmother Kris Jenner also took to the social media platform to share a message. It read in part, "I can hardly believe you are 4 years old!!!!"

Kris Jenner shares all the pics

Jenner maxed out on the photos she could attach in her post, filling all 10 slots as she celebrated the gorgeous boy. Several pictures included other family members, including Kim and Kanye.

In one of them, a younger Saint kissed a huge print-out of Kris. Other photos included big sister North and other relatives. We'd also like to wish the big boy a Happy Birthday.

Saint's blended bash

So far, we haven't seen any party moves for Saint's birthday. Last year, the little boy had a shared bash with his cousin, Reign Aston Disick, who was born on December 14.

The two had a Tarzan-themed party complete with an in-home jungle at Kim's house. The KKW Beauty mogul shared inside looks at the event on Instagram stories.

Kris Jenner turns 64

Last month, another member of the clan celebrated her birthday by going back to her roots. Kris Jenner turned 64 and was treated to a throwback surprise from Kim.

The reality star and her siblings' rented out their childhood home for the occasion, drawing tears from the family for which the house holds sentimental value. We can't wait to see what she does next year.