Garrison Brown, the son of "Sister Wives" stars Janelle and Kody Brown, has died. He was 25.

In an Instagram post on Tuesday afternoon, Janelle Brown announced the death of their "beautiful boy."

"Kody and I are deeply saddened to announce the loss of our beautiful boy Robert Garrison Brown," she wrote. "He was a bright spot in the lives of all who knew him. His loss will leave such a big hole in our lives that it takes our breath away."

"We ask that you please respect our privacy and join us in honoring his memory," she added.

(L-R) Janelle Brown, Meri Brown, Kody Brown and Christine Brown from "Sister Wives" attend a pre-show reception for the grand opening of "Dancing With the Stars: Live in Las Vegas" at the New Tropicana Las Vegas April 13, 2012 in Las Vegas, Nevada. (Ethan Miller/Getty Images for AEG Live)

In a statement to Fox News Digital, TLC confirmed Garrison Brown's death.

"We are devastated to hear of the tragic loss of Garrison Brown," TLC said. "We extend our deepest sympathies and heartfelt condolences to the Brown family at this difficult time."

"Sister Wives," which is a TLC reality television show, follows the polygamist family of Kody Brown.