"Hunter Montgomery, thank you for making our family complete! Our hearts are so full ♥️♥️♥️," Brooke captioned a photo of Hucksley holding his newborn baby brother on a hospital bed, according to PEOPLE.
As for Kim, she took to Instagram to share the happy news with her followers.
"Welcome Hunter Montgomery 💙🍼🌟 @brookewiederhorn & @thayerwiederhorn have brought another beautiful baby boy into our life❤️ I now have two of most amazing, beautiful, perfect grandsons in the whole world 🌎 ❤️❤️ I am over joyed with gratitude & love!! There is no love like this!! I am so proud, excited, and I feel incredibly blessed 🙏🏻 I love you you all so very much ❤️❤️❤️❤️ #proudmom#proudnana #grandma #love #grateful #blessed #hucksley&hunter💙💙 @hucksleywiederhorn ▶️slide for photos 🌟," she wrote.
Brooke celebrated her son’s baby shower back in March alongside with her mother Kim, her siblings and her two aunts, Kathy Hilton and Kyle Richards, and their families.
Photo Credit: Bravo