Greg Grunberg
Jul 11, 1966 (58 years old) in Los Angeles, California, USA
Gregory Phillip "Greg" Grunberg (born July 11, 1966) is an American television actor. He is best known from starring as Matt Parkman on the NBC television series Heroes. Other notable roles included the characters Sean Blumberg on Felicity (1998–2002) and Eric Weiss on Alias (2001–2006), both created and produced by childhood friend J. J. Abrams.
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Known For

Law & Order: Special Victims Unit
Detective Mark McDaniels

The Flash
Tom Patterson

The Simpsons
Bad Robot Security Guard (voice)

House
Ronald Neuberger

Hawaii Five-0
Jeff Morrison

CSI: Crime Scene Investigation
Len Bryant

Criminal Minds
Chris Callahan

American Dad!
Bjorn (voice)

Lost
Seth Norris

The Boys
Agent Bill Pearson
Credits
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Duster 2025Abbott★ NR
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The Holiday Junkie 2024Darren★ 5.8
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Getting LOST 2024Self★ 7
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Satanic Hispanics 2022Detective Arden★ 5.6
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The Fabelmans 2022Bernie Fein★ 7.6
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Pictionary 2022Self★ 3.5
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Under the Lights 2022911 Operator★ NR
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The Horror Crowd 2020Himself★ 6
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Eugene Wylder★ 5.9
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The Skywalker Legacy 2020Self★ 7.7
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Burning Dog 2020Smythe★ 6.7
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9-1-1: Lone Star 2020George★ 8.1
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Snap Wexley★ 6.3
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★ 8.7
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The Boys 2019Agent Bill Pearson★ 8.5
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1st Born 2019Dr. Cooper★ 6.2
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A Star Is Born 2018Phil (Jack's Driver)★ 7.5
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Principal★ 9
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25 Words or Less 2018Self★ 6.7
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Castle Rock 2018Andersen★ 7.2
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Paterno 2018Scott Paterno★ 6.2
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Steel Maxum (voice)★ 7.1
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Tomboy 2018James★ 5.6
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Joe (voice)★ 5.6
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The Saint 2017Detective Garces★ 5.3
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Goliath 2016Greg Wetzel★ 7.6
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Star Trek Beyond 2016Commander Finnegan★ 6.8
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Snap Wexley★ 7.3
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Baby, Baby, Baby 2015★ 5.8
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Tales of Halloween 2015Alex Mathis★ 5.8
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Heroes Reborn 2015Matt Parkman★ 6.8
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Life in Pieces 2015Mikey★ 7.1
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Win, Lose or Love 2015Hal Harrington★ 5.3
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Bruce★ 5.6
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The Flash 2014Tom Patterson★ 7.8
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Kurt Baronson★ 7.2
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Divide & Conquer 2014Evan★ NR
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Big Ass Spider! 2013Alex Mathis★ 5.6
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Masters of Sex 2013Gene Moretti★ 7.1
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End of the World 2013Owen Stokes★ 4.7
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Doubt 2013Mark Calzonetti★ NR
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It's Dark Here 2013Dr. Wagner★ NR
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Match Game 2012★ 1
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Baby Daddy 2012Ray Wheeler★ 7.1
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The Client List 2012Dale Locklin★ 6.7
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Super 8 2011Sitcom Actor★ 6.8
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Love Bites 2011Judd★ 6.4
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Hawaii Five-0 2010Jeff Morrison★ 7.8
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Group Sex 2010Jerry★ 5.9
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Bond of Silence 2010Detective Paul Jackson★ 6.3
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Kill Speed 2010Moore★ 4.1
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Magic 2010Detective Davis★ 3
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Odin (voice)★ NR
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Self★ NR
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Star Trek 2009Stepdad (voice)★ 7.4
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Self★ NR
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Heroes Unmasked 2007Himself★ 10
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Head Case 2007Self★ 6.5
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Heroes 2006Matt Parkman★ 7.5
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Psych 2006Jay Gianukos★ 7.9
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The Jake Effect 2006Nick Case★ 8
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Kevin★ 6.7
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What About Brian 2006Samaritan Driver (uncredited)★ 6.2
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The Darkroom 2006Bob★ 5.4
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Criminal Minds 2005Chris Callahan★ 8.3
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Hell's Kitchen 2005Self - Restaurant Patron★ 6.8
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American Dad! 2005Bjorn (voice)★ 7
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★ NR
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House 2004Ronald Neuberger★ 8.6
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Lost 2004Seth Norris★ 7.9
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I Love the '90s 2004Self★ 7
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The Ladykillers 2004TV Commercial Director★ 6.1
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Malibu's Most Wanted 2003Brett★ 5.1
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Shirtless Fan 'T'★ 6
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Monk 2002Jack Leverett★ 7.9
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The Dead Zone 2002Frankie Cantrell★ 7.2
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Icons 2002★ 8
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The Medicine Show 2001Barry★ 4.7
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Alias 2001Eric Weiss★ 6.8
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Len Bryant★ 7.6
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Hollow Man 2000Carter Abbey★ 5.9
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Detective Mark McDaniels★ 7.9
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The Muse 1999Four Seasons Hotel Security★ 5.2
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Felicity 1998Sean Blumberg★ 6.6
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V.I.P. 1998Loeb★ 5.3
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Mr. Murder 1998Dr. Gutheridge★ 5.2
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Rudy's Assistant - Sean Nusbalm★ 5
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Oh Baby 1998★ 5
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BASEketball 1998Wilke - New Jersey Informant★ 6.1
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Senseless 1998Steve★ 6.2
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★ 6.5
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Picture Perfect 1997Date #1 (uncredited)★ 5.9
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Dinner and Driving 1997Michael★ 6.5
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Profiler 1996★ 6.9
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The Trigger Effect 1996Double Date Guy★ 5.8
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The Pallbearer 1996An Abernathy Cousin★ 4.9
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Pacific Blue 1996Scott Rhinehart★ 5.3
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Ned and Stacey 1995Nick★ 7.2
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Future Shock 1994Limo Driver★ 4
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Diagnosis: Murder 1993Brad Carver★ 7.1
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Manager★ 2.4
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Melrose Place 1992Gatman★ 5.9
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Silk Stalkings 1991★ 6.1
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Kozlowski★ 4.9
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Stolen: One Husband 1990Best Man★ 3
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The Simpsons 1989Bad Robot Security Guard (voice)★ 8
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Baywatch 1989★ 5.9
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Murphy Brown 1988★ 6.4