Gregory Phillip "Greg" Grunberg (born July 11, 1966 in Los Angeles, California) is an American television and film actor. He is best known for starring as Matt Parkman on the Creator/{{NBC}} television series ''Series/{{Heroes}}''. Other notable roles include the characters Sean Blumberg on ''Series/{{Felicity}}'' (1998–2002), the pilot Seth Norris on ''Series/{{Lost}}'', and Eric Weiss on ''Series/{{Alias}}'' (2001–2006), all three created and produced by his childhood friend Creator/JJAbrams, and as exterminator Alex Mathis in ''Film/BigAssSpider''.

His brother is actor Creator/BradGrunberg.

!Film Roles
* 1998 – ''Film/{{BASEketball}}'' as Wilke
* 2000 – ''Film/HollowMan'' as Carter Abbey
* 2006 – ''Film/MissionImpossibleIII'' as Kevin
* 2009 – ''[[Film/StarTrek2009 Star Trek]]'' as James T. Kirk's stepfather
* 2013 – ''Film/BigAssSpider'' as Alex
* 2015 – ''[[Film/TheForceAwakens Star Wars Episode VII: The Force Awakens]]'' as Temmin "Snap" Wexley
* 2016 – ''Film/StarTrekBeyond'' as Commander Finnegan
* 2017 - ''WesternAnimation/SuicideSquadHellToPay'' as [[ComicBook/DoctorFate Steel Maxum]]
* 2019 - ''[[Film/TheRiseOfSkywalker Star Wars Episode IX: The Rise of Skywalker]]'' as Temmin "Snap" Wexley
* 2022 - ''Film/TheFabelmans'' as Bernie Fein

!Television Roles
* 1998 – ''Series/DiagnosisMurder'' as Brad Carver
* 1998–2002 – ''Series/{{Felicity}}'' as Sean Blumberg
* 2001 – ''Series/NYPDBlue'' as Joey Schulman
* 2001–2006 – ''Series/{{Alias}}'' as Eric Weiss
* 2004 – ''Series/TheDeadZone'' as Frankie Cantrell
* 2004, 2010 – ''Series/{{Lost}}'' as Seth Norris (Pilot)
* 2006 – ''Series/{{Monk}}'' as Jack Leverett
* 2006 – ''Series/{{House}}'' as Ronald Neuberger
* 2006–2010 – ''Series/{{Heroes}}'' as Matt Parkman
* 2011 – ''Series/LoveBites'' as Judd Rousher
* 2011 – ''Series/HawaiiFive0'' as Agent Jeff Morrison
* 2012 – ''Series/{{Psych}}'' as Jay
* 2013 – ''Series/MastersOfSex'' as Gene Moretti
* 2016 – ''Series/TheFlash2014'' as Detective Patterson
* 2021 - ''Series/TheRookie'' as Larry Macer

!Videogame Roles
* 2005 – ''VideoGame/CondemnedCriminalOrigins'' as Ethan Thomas
* 2011 – ''Videogame/LANoire'' as Hugo Moller