Stephen Root (born November 17, 1951) is an American actor and voice actor. He has starred as Jimmy James on the television sitcom NewsRadio, as Milton Waddams in the film Office Space (1999), and as the voices of Bill Dauterive and Buck Strickland in the animated series King of the Hill (1997–2010). His other roles have included Captain K'Vada in the Star Trek: The Next Generation two-part episode "Unification" (1991), Mr. Lund in O Brother, Where Art Thou? (2000), Gordon Pibb in DodgeBall (2004), Hawthorne Abendsen in seasons 2-4 of the series The Man in the High Castle, Jim Hudson in Get Out (2017), and supporting roles in a variety of HBO series, including Boardwalk Empire, Barry, and Perry Mason.
He is also known as Stephen Aaron Root.