Kelly Reilly (born 18 July 1977) is an English actress. Reilly's performance in After Miss Julie at the Donmar Warehouse made her a star of the London stage and earned her a nomination for a Laurence Olivier Theatre Award for Best Actress of 2003. Aged 26, she's the youngest person ever nominated for that award. And, in 2005, she won Best Newcomer Award at the Cannes Film Festival for her role as Wendy in The Russian Dolls (Les Poupées Russes).

Kelly Reilly plays as Beth Dutton in Yellowstone.
Kelly Reilly is the top #1 member of the cast and appears in 29 episodes.

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 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. Description above from the Wikipedia article Luke Grimes, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Luke Grimes plays as Kayce Dutton in Yellowstone.
Luke Grimes is the top #2 member of the cast and appears in 29 episodes.

Kelsey Asbille plays as Monica Dutton in Yellowstone.
Kelsey Asbille is the top #3 member of the cast and appears in 29 episodes.

Brecken Merrill plays as Tate Dutton in Yellowstone.
Brecken Merrill is the top #4 member of the cast and appears in 29 episodes.

Cole Kenneth Hauser (born March 22, 1975) is an American film and television actor best known for his roles in School Ties, Good Will Hunting and 2 Fast 2 Furious. 

Cole Hauser plays as Rip Wheeler in Yellowstone.
Cole Hauser is the top #5 member of the cast and appears in 29 episodes.

Gil Birmingham (born July 13, 1966) is an American actor of Comanche ancestry. He made his first TV appearance on an episode of Riptide, and has gone on to star in more than 40 films, television, and theater productions, such as Twilight, End of the Spear, Dreamkeeper and The Doe Boy.

Gil Birmingham plays as Thomas Rainwater in Yellowstone.
Gil Birmingham is the top #6 member of the cast and appears in 29 episodes.

Daniel "Danny" Huston (born May 14, 1962) is an American actor and director. Description above from the Wikipedia article Danny Huston, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Danny Huston plays as Dan Jenkins in Yellowstone.
Danny Huston is the top #7 member of the cast and appears in 29 episodes.

Jefferson White is an actor.

Jefferson White plays as Jimmy Hurdstrom in Yellowstone.
Jefferson White is the top #8 member of the cast and appears in 29 episodes.

Wesley Cook "Wes" Bentley (born September 4, 1978) is an American film actor known for his roles as Ricky Fitts in American Beauty (1999) and Seneca Crane in The Hunger Games (2012). Bentley was one of four subjects in the documentary My Big Break (2009), which covered his fame after American Beauty and struggles with substance abuse. Rebuilding his career, he starred in the premier of Venus in Fur by David Ives in the off-Broadway production in 2010, whose run was extended. Description above from the Wikipedia article Wes Bentley, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Wes Bentley plays as Niander Wallace Jr. (voice) in Yellowstone.
Wes Bentley is the top #9 member of the cast and appears in 12 episodes.

Kevin Michael Costner (born January 18, 1955) is an American actor and filmmaker. He has received two Academy Awards, two Golden Globe Awards, a Primetime Emmy Award, and two Screen Actors Guild Awards. Costner starred in Fandango, American Flyers, Silverado and many other films. He rose to prominence with his starring roles in The Untouchables and No Way Out (1987). He then starred in Bull Durham (1988), Field of Dreams (1989), Dances with Wolves (1990), for which he won two Academy Awards, JFK (1991), Robin Hood: Prince of Thieves (1991), The Bodyguard (1992), A Perfect World (1993), and Wyatt Earp (1994). In 1995, Costner starred in and co-produced Waterworld. His second directorial feature, The Postman, was released in 1997. He later starred in Message in a Bottle (1999), For Love of the Game (1999), Thirteen Days (2000), 3000 Miles to Graceland (2001), Dragonfly (2002), Rumor Has It (2005), The Guardian (2006), Mr. Brooks (2007), 3 Days to Kill (2014), McFarland, USA (2015), Draft Day (2014), and Criminal (2016). He has also played supporting parts in such films as The Upside of Anger (2005), Man of Steel (2013), Hidden Figures (2016), Molly's Game (2017), and Let Him Go (2020). On television, Costner portrayed Devil Anse Hatfield in the miniseries Hatfields & McCoys (2012), winning the Primetime Emmy Award for Outstanding Lead Actor in a Limited Series or Movie. Since 2018, he has starred as John Dutton on the drama series Yellowstone for which he received a Screen Actors Guild Award nomination.

Kevin Costner plays as Self in Yellowstone.
Kevin Costner is the top #10 member of the cast and appears in 4 episodes.