<Li> Luke Grimes as Kayce Dutton, a former US Navy SEAL and one of John and Evelyn's sons . He lives on the local Indian reservation with his wife and son . Rhys Alterman portrays a young Kayce in a recurring role . </Li> <Li> Kelly Reilly as Beth Dutton, a financier and the daughter of John and Evelyn . She is educated, highly intelligent, and a master manipulator . She is also, however, very unstable and suffers from a substance abuse problem . Kylie Rogers portrays a young Beth in a recurring role . </Li> <Li> Wes Bentley as Jamie Dutton, an attorney, aspiring politician, and one of John and Evelyn's sons . Although completely loyal to his father and family, he is constantly frustrated at the current state of his family . He also has an intense love / hate relationship with his sister Beth . Dalton Baker portrays a young Jamie in a recurring role . </Li> <Li> Cole Hauser as Rip Wheeler, the ranch foreman at Yellowstone and John's right - hand man and enforcer . Rip has worked on the ranch for many years and is fiercely loyal to John . He has an on - again, off - again relationship with Beth . Kyle Red Silverstein portrays a young Rip Wheeler in a guest appearance in the episode "The Unraveling: Pt. 1". </Li>

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