Luke Timothy Grimes (born January 21, 1984) is an American actor and musician. He is known for his role as real-life Navy SEAL Marc Alan Lee in the acclaimed film American Sniper. He played Christian Grey's brother, Elliot, in the film Fifty Shades of Grey (2015), and its sequels, Fifty Shades Darker (2017) and Fifty Shades Freed (2018). He starred as Kayce Dutton in the Paramount Network drama series Yellowstone (2018–2024). Grimes was born in Dayton, Ohio, the son of a Pentecostal pastor. Gri...