Stephen Root (born November 17, 1951) is an American actor. He has starred as Jimmy James on the NBC sitcom NewsRadio (1995–1999), as Milton Waddams in the film Office Space (1999), and voiced Bill Dauterive and Buck Strickland on the animated series King of the Hill (1997–2010, 2025–present).
Root has appeared in numerous Coen brothers films, including O Brother, Where Art Thou? (2000), The Ladykillers (2004), No Country for Old Men (2007), The Ballad of Buster Scruggs (2018), and The Tragedy of Macbeth (2021). Other notable film roles include Dave (1993), Dodgeball (2004), Idiocracy (2006), Cedar Rapids (2011), Selma (2014), Trumbo (2015), Get Out (2017), and On the Basis of Sex (2018).
His television roles have included Capt. K'Vada in the Star Trek: The Next Generation two-part episode "Unification" (1991) and Hawthorne Abendsen in seasons 2–4 of the series The Man in the High Castle. He has supporting roles in a variety of HBO series, including Boardwalk Empire, True Blood, Perry Mason, and Succession. He starred as Monroe Fuches in the HBO dark comedy series Barry, for which he was nominated for a Primetime Emmy Award for Outstanding Supporting Actor in a Comedy Series in 2019.
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Professor O'Callaghan (voice)
Bildorf (voice)
Michael Kirkwood
Bill Prady
Dick (voice)
Dick / Dentist's Father (voice)
Eddie
Gromflomite General (voice)
Mr. Lager
Captain K'Vada
Judge Murphy Wicks
John Pratt
Raymond
Harbin
Bill Dauterive (voice)
Dan
Bob Mayer
Floyd (voice)
Arthur Hammond
Charlie Lane
Lynn Boyle
Martin (voice)
Ethan Melman
Professor Anders (voice)
Ricardo Collini
Hawthorne Abendsen
Jack Haly (voice)
Jeremiah Whitewhale (voice)
Bud Gleeful (voice)
Bud Gleeful / Additional Voices (voice)
Mike Reardon
John Tremaine Jr.
Exterminator
Spirit of Death
Mr. Willard
Ron Petkus
White Lotus Leader / Gommu / Chung (voice)
Gommu (voice)
Al Crannis
Frank / Start (voice)
Brian
Brian (voice)
Brother Timothy
Judge Walsh
Pop-Pop Porter (voice)
Texan (voice)
Chester Yapsby (voice)
Phillipe Bullion / Pop-Pop Porter (voice)
Mr. Nevius (voice)
Memphis (voice)
Gaston Means
J.W. Guidebook (voice)
Atty. Brandon McCafferty
Woozy Winks (voice)
Penguin / Planet Master (voice)
Penguin / Carnival Barker (voice)
Killer Croc / Penguin (voice)
Harvey Toplin
Val Yor (voice)
Dean Stuart / Additional Voices (voice)
Stuart (voice)
Additional Voices (voice)
Prime Monister (voice)
Bubbles (voice)
Gary (voice)
Jim Hudson
Ed Vanderspeigle
Gene Jakobowski (voice)
Man Who Hires Wells
Lance (voice)
Martin Mertens (voice)
Cap Collins
Aardvark Dad (voice)
General Stomtonovich
Mayor Toadstool (voice)
Rexford / Zach / Rover (voice)
Zach / Bread Monster (voice)
Rexford / Trees / Video Person (voice)
Dr. Drake Kelson
Bernard (voice)
Grampa (voice)
Hank Maestro
Reverend Amos Howell / Unity (voice)
Self
Phil Asher
Doc / Merrimack / Mr. Snuggles (voice)
Monroe Fuches
Sheriff (voice)
Sheriff / Sentry #2 (voice)
Lortha Peel
Carty
Mildew (voice)
The Nanomachines (voice)
Teller (segment "Near Algodones")
Maynard Barnes
Theodore 'Teddy' Roosevelt (voice)
George MacPherson
Mortimer Begoyle
Chief Cogburn / Merie Cogburn (voice)
Merie Cogburn (voice)
Chief Cogburn (voice)
Gordon
Jimmy James
Gordon
Dwight Dixon
Judge Hector "The Hangman" (uncredited)
Police Sgt.
Cat Man (voice)
Dr. Hepa
Jeff Strawberry (voice)
Bubbles (voice)
Johnny Forrealz
Dr. Mindala
Chris Kraft
Mr. Big Corporation (voice)
Mr. Andrews (voice)
Berg
Dennis Mansky
Hattanzo the Drifter (voice)
Gus Lacey
Mr. Fyde / Avacadwoe / Hush Muffleman (voice)
Police Chief Earl Grant (voice)
Mr. M / Bob (voice)
Judge Taylor
Col. Al Lingo
Elliot
Talent Scout (voice)
Milton Waddams
Solomon Smythe
Pascal
Charles Thompson
Habberman
Mr. Tucker
Glover
Porter
Radio Station Man
Zeb Zoober (voice)
Mr. Sweeney
Arthur Parsons
Chris
Dr. Rostrum (voice)
KC
Dr. Freeman
Goodman
Chode (voice)
Secretary of War Edwin Stanton
Cringer / Battle Cat (voice)
Fernand Gudge
J. Edgar Hoover
John Lloyd
Sheriff Bobby
Herb
Don Durenberger
Daddy Mac
Mr. Chaney
Principal Doppler
Self
Governor Haskell
Dr. Rogers
Farmer (voice)
Gerald Adams
Sheriff Brock
Max Alvarez
Gene
Vince Masters
Cringer (voice)
Warlock G (voice)
Warlock G / Mr. Assam (voice)
Warlock G / Police Officer (voice)
Agent Flannigan
Arthur Koehler
Gary Murray
Cockmando (voice)
Neil Mullin
Frank
Greenie
Coontz
Burt (voice)
Billy Cusimano
Mr. Crenshaw
Awakened Neighbor
Mike Cook
Kane Cohen
Pat Jennings
Mr. Hentley
Walt Breckman
Turtle (voice)
Clarence Sweetwater
DEA Agent (Toilet)
Zor-El (voice)
Self
Cowboy Gambler (voice; uncredited)
F.A.A. Negotiator
Senator Culpepper
Brendon (voice)
Sherrif Wynan
Curt Reynolds
R.O
Professor Brown
Uncle Henry / Crows (voice)
Suds
Dr. Donovan (voice)
Tony
Big Ducky (voice)
Mark (voice)
Roger
Burt
Dwight Nestor
Self
Avery Boomer
Cameron
Kevin McDonald
Hymie King
RKO Guard
Major Moreland
Steve
Title Narrator
Fred Franklin
Ed Kirkman
Petey's Father (voice)
Jail Tattoo Artist (voice)
Richard Clarke
Mark Hastings
Ron Walton
Fenton
Dr. Kirby
Dean Burbage
Randolph
Todd
Mickey
Sculptor
Uncle Danny
Uncle Henry (voice)
Morty Van Rookle
Senator Larder
Hugh
George
Dutch
Bill Krogstad
Jaan Laaman
Self
Graham Dunbar
Ken Russel
Major Moreland
Lance (voice)
Kevin McDonald
Self
The Jackalope (voice)
Floyd / Additional Voices (voice)
Analyst
Chode (voice)
Remington
Father Browning
Self - Panelist