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. Grimes graduated from Dayton Christian High School in 2002. He moved to New York City to study acting at the American Academy of Dramatic Arts. Grimes has appeared in All the Boys Love Mandy Lane, War Eagle, Arkansas, and Assassination of a High School President, which received a limited release in March 2009. He also appeared in the ABC drama Brothers & Sisters as Ryan Lafferty, the illegitimate son of William Walker, patriarch of the show's family. Beginning with Season 4, he became a series re