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 regular.
He starred in the 2010 FX movie pilot, Outlaw Country, with Haley Bennett and Mary Steenburgen. Grimes played a cowboy named Eli Larkin. The series was not picked up by FX, but the pilot aired on August 23, 2012, as a television movie. In 2012, he appeared in the Liam Neeson thriller Taken 2 as Neeson's daughter's boyfriend.
Grimes portrayed vampire James Kent in True Blood for six episodes during the show's sixth season but later left the show and was replaced by Nathan Parsons. Reports, confirmed by BuzzFeed, indicated that he quit because he refused to participate in same-sex kissing or sex scenes or to play a character that was attracted to men. Grimes's publicist stated that he departed to pursue other opportunities.
Grimes played United States Navy SEAL Marc Lee, who was killed in action in 2006, in American Sniper (2014). 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). Grimes played Todd Belkin in Freeheld (2015). Since 2018, he has starred alongside Kevin Costner in the Paramount Network drama series Yellowstone in the role of Kayce Dutton.
Grimes married Brazilian model Bianca Rodrigues Grimes in November 2018, and the couple had their first child, a son, in 2024. He moved with his family to the Bitterroot Valley of southwestern Montana in 2020.
In January 2024, Grimes released “Burn—Live From Nashville” on Spotify.
On March 8, 2024, Grimes released his self-titled debut album, Luke Grimes.
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Known For

Eddington
Guy
2025

Happiness for Beginners
Jake
2023

The Kelly Clarkson Show
(1 episode)
2019

Into the Ashes
Nick Brenner
2019

Yellowstone
Kayce Dutton · (53 episodes)
2018

Fifty Shades Freed
Elliot Grey
2018

El Camino Christmas
Eric Roth
2017

Fifty Shades Darker
Elliot Grey
2017

Shangri-La Suite
Jack Blueblood
2016

The Magnificent Seven
Teddy
2016

Manhattan Undying
Max Garman
2016

Forever
Charlie
2015

Freeheld
Todd Belkin
2015

Fifty Shades of Grey
Elliot Grey
2015

American Sniper
Marc Lee
2014

Squatters
Michael Silverman
2014

The Tonight Show Starring Jimmy Fallon
Self · (1 episode)
2014

Dark Around the Stars
Evan
2013

The Wait
Ben
2013

Taken 2
Jamie
2012

Outlaw Country
Eli Larken
2012

Honest Trailers
Elliot Grey (archive footage) · (1 episode)
2012
The Light in the Night
Boy
2011

Shit Year
Harvey West
2010

True Blood
James · (6 episodes)
2008

Assassination of a High School President
Marlon Piazza
2008

War Eagle, Arkansas
Enoch
2007

Brothers and Sisters
Ryan Lafferty · (48 episodes)
2006

All the Boys Love Mandy Lane
Jake
2006

Jimmy Kimmel Live!
Self · (1 episode)
2003

LIVE with Kelly and Mark
Self - Guest · (1 episode)
1988
Y: Marshals
Kayce Dutton · (1 episode)