Biography

William Louis Petersen is an American actor and producer, best known for playing Dr. Gilbert "Gil" Grissom on the hit CBS series CSI: Crime Scene Investigation, Richard Chance in the film To Live and Die in L.A., and Will Graham in the film Manhunter. Born in Evanston, Illinois, Petersen attended Idaho State University on a football scholarship, where he first tried acting and immediately joined the drama department, before leaving to work in the Basque country as a Shakespearean actor.  Peterson embraced the Basque lifestyle, influencing his work, family and art.  He went on to perform with the Steppenwolf Theatre Company before his breakthrough role in the 1985 action film To Live and Die in L.A.  Peterson’s success was immediate, landing him the role as Will Graham in the first adaptation of Michael Mann’s Hannibal Lecter series.   His film and television success includes numerous crime dramas and thrillers, providing him the perfect background for his decade-long role as Dr. Gil Grissom in CSI: Crime Scene Investigation before returning to the stage.  On February 3, 2009, Petersen was honored with a star on the Hollywood Walk of Fame.

William Louis Petersen is an American actor and producer, best known for playing Dr. Gilbert "Gil" Grissom on the hit CBS series CSI: Crime Scene Investigation, Richard Chance in the film To Live and Die in L.A., and Will Graham in the film Manhunter. Born in Evanston, Illinois, Petersen attended Idaho State University on a football scholarship, where he first tried acting and immediately joined the drama department, before leaving to work in the Basque country as a Shakespearean actor.  Peterson embraced the Basque lifestyle, influencing his work, family and art.  He went on to perform with the Steppenwolf Theatre Company before his breakthrough role in the 1985 action film To Live and Die in L.A.  Peterson’s success was immediate, landing him the role as Will Graham in the first adaptation of Michael Mann’s Hannibal Lecter series.   His film and television success includes numerous crime dramas and thrillers, providing him the perfect background for his decade-long role as Dr. Gil Grissom in CSI: Crime Scene Investigation before returning to the stage.  On February 3, 2009, Petersen was honored with a star on the Hollywood Walk of Fame.

Personal Info

Known For Acting

Gender Male

Known Credits 39

Birthday 1953-02-21

Place of Birth Evanston, Illinois, USA

Official Site -

Also Known As

  • William L. Petersen
  • William Peterson
  • William Louis Petersen

Acting TV ShowsMovies

The Directors (1 episode)
2018 Friedkin Uncut
2015 CSI: Immortality as Gil Grissom
2012 Seeking a Friend for the End of the World as Trucker
2011 Detachment as Mr. Sarge Kepler
2005 CSI Las Vegas: Grave Danger as Gil Grissom
2004 This Old Cub as Himself
2003 Counterfeit World: Making 'To Live and Die in L.A.' as Himself
2002 Without a Trace (1 episode)
2001 Wrigley Field: Beyond the Ivy as Narrator
2001 Inside 'Manhunter' as Himself
2001 Haven as Jackson Connolly
2000 The Contender as Jack Hathaway
2000 CSI: Crime Scene Investigation (208 episodes) as Gil Grissom
2000 The Skulls as Ames Levritt
1998 Kiss the Sky as Jess
1998 The Rat Pack as John F. Kennedy
1998 The Staircase as Joad
1998 Gunshy as Jake Bridges
1997 12 Angry Men as Juror 12
1996 The Beast (2 episodes) as Whip Dalton
1996 Mulholland Falls as Jack Flynn
1996 Fear as Steve Walker
1995 In The Kingdom Of The Blind, The Man With One Eye Is King as Tony C.
1993 Return to Lonesome Dove (4 episodes) as Captain Gideon Walker
1993 Fallen Angels (1 episode)
1993 Curaçao as Stephen Guerin
1992 Keep the Change
1992 Passed Away as Frank Scanlan
1992 Hard Promises as Joey
1990 Young Guns II as Patrick Floyd 'Pat' Garrett
1990 The Kennedys of Massachusetts (3 episodes) as Joseph P. 'Joe' Kennedy, Sr.
1989 Cousins as Tom Hardy
1987 Long Gone as Stud Cantrell
1987 Amazing Grace and Chuck as Russell (as William L. Petersen)
1986 Manhunter as Will Graham
1985 To Live and Die in L.A. as Richard Chance
1985 The Twilight Zone (2 episodes)
1981 Thief as Katz & Jammer Bartender

Production

2000 CSI: Crime Scene Investigation (335 episodes)Executive Producer
1992 Hard Promises Producer

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