Kelly Reilly sits down with ET's Cassie DiLaura for a candid conversation on all things 'Yellowstone.' The 44-year-old actress opens up about her character, Beth Dutton, like never before. Plus, Reilly gushes about co-star Cole Hauser and their TV romance. 'ET Presents: 'Yellowstone' Aftershow,' which includes more from Reilly, along with other cast members, is streaming now on Paramount +.