ET's Cassie DiLaura will host the new series.
The new series will feature unseen footage and interviews with the stars and co-creator of Yellowstone to dive into the show's latest episodes.
The first installment of ET Presents: Yellowstone Aftershow will drop Sunday, Dec. 19 at 6 p.m. PT/9 p.m. ET, and is tied to Yellowstone #408. In addition to stories from the set, viewers will get a sneak peek at the last episode before the epic season 4 finale. The second installment will debut Sunday, Dec. 26.
ET Presents: Yellowstone Aftershow will be available alongside the premiere episode of the new Paramount+ original series 1883, which serves as an origin story for Yellowstone.
"I can't imagine spending five months, especially as hard as we are working with six days a week, I can't imagine her not being there with me," he said. "Being able to work together and do the same thing and feed off each other and talk about it and give each other feedback -- and criticism too when it needs to be there."
Click here to check out ET Presents: Yellowstone Aftershow on Paramount+. Viewers can sign up and get a free month of the streaming service with the code AFTERSHOW.
Watch the video below for more on 1883.