Kayce John Dutton is a horseman and son of the Yellowstone Ranch owner John Dutton and Evelyn Dutton. Kayce is married to Monica Long.
Kayce served in the U.S. Navy as a Navy SEAL. Kayce was highly decorated, but also suffers from PTSD from some of the things he had to do as a SEAL.
Kayce Dutton is played by Luke Grimes. Rhys Alterman played a younger Kayce in several flashback episodes.