Kris Jenner celebrates 'amazing grandsons' Mason and Reign's birthdays

Kris Jenner is celebrating the birthdays of her "amazing grandsons" Mason and Reign!

On Sunday, the 70-year-old matriarch took to her Instagram handle to post a joint tribute on the boys' special day.

"Happy birthday to our birthday twins, my amazing grandsons, Mason and Reign!' Jenner penned while sharing a slew of throwback photos of Kourtney Kardashian's kids.

She further penned, "Mason, I can’t believe you are 16!!! Watching you grow into such a kind, thoughtful, creative, and confident young man has been one of the greatest joys of my life and I’m so proud of you."

Turning her attention to the younger Disick, Jenner added, "Reign, you bring so much joy, laughter, and light wherever you go. Your curiosity, energy, and spirit fill every room and remind us all to see the world with wonder."

"You both have your own unique magic and you make our family so proud just by being who you are. I feel endlessly grateful and blessed to be your grandma and I love you both more than words can say!!" she concluded the lengthy note.

For those unversed, Kourtney Kardashian shares sons, Mason and Reign, with her ex-partner Scott Disick.