William O'Leary (born October 19, 1957) is an American actor. He is best known for playing Marty Taylor on Home Improvement (1994–1999).
Early life He was born in Chicago, Illinois and started acting at the age of 7. He graduated from Highland Park High School in Highland Park, Illinois, in 1976.
O'Leary received a degree in acting from Illinois State University and in 1982 received an MFA from the University of Washington's Professional Actor Training Program.
Career O'Leary made his Broadway debut in 1986 alongside Ed Harris and Judith Ivey as Art in Precious Sons at the Longacre Theatre.
He played Marty Taylor, the younger brother of Tim Taylor (Tim Allen), on Home Improvement, and was the primary antagonist, General Xaviax, on Kamen Rider: Dragon Knight.
Filmography Year Title Role Notes1987Nice Girls Don't ExplodeAndy WalkerJames Walker 1988Bull DurhamJimmy Miami ViceScotty Episode: "Bad Timing"1989Lost AngelsLink Matlock Season 4 Episode 5 Newspaper Journalist "Paul"1991Flight of Black AngelCapt. Eddie Gordon, Callsign Black Angel Hot Shots!Lieutenant Pete 'Dead Meat' Thompson1991–1992Dear JohnBen22 episodes1993In the Line of Duty: Ambush in WacoAdrian1994–1999Home ImprovementMartin "Marty" Taylor30 episodes 1994The Enemy WithinLt. William Dorsett1995–1996Murder, She WroteFBI Agt. Ed Crider 2 episodes 1996Candyman: Farewell to the FleshEthan Tarrant Project ALFCapt. Rick Mullican 1997Mad CityCTN Junior Executive #1 A Time to RevengeLyle Whittmar 2000DaybreakHead of SecurityThe X-FilesMan at Gas StationEpisode: "Roadrunners"2002–2003CSI: MiamiStewart Otis 2 episodes: "Broken" & "Body Count"2003Terminator 3: Rise of the MachinesMr. Smith2005Miss Congeniality 2: Armed and FabulousAgent JenkinsNUMB3RSRoland HaldanePilot episode2007MoolaMickey Fish2008Soccer MomHarley the Tournament Director2009Kamen Rider: Dragon KnightXaviaxRecurring cast24Sid Paulson2 episodes2011In My PocketMr. Jameson2016Is That a Gun in Your Pocket?Sam Graves
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