Luke Timothy Grimes (born January 21, 1984) is an American actor, born in Dayton, Ohio as the youngest of four children. Luke graduated from Dayton Christian High School in 2002. He moved to New ...

Luke Grimes isn’t mad at his Yellowstone costar Kevin Costner for exiting the hit show. Grimes plays the youngest son of Costner's character, John Dutton III, and addressed Costner’s departure ...

Kelly Reilly, Cole Hauser and Luke Grimes chat with ET about ‘Yellowstone’ season 5 part 2, which premieres Nov. 10 on Paramount. Luke Grimes chats with ET at the NYC premiere of 'Yellowstone ...