
William L. Petersen
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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.
Known for
Credits

Fear (1996)
as Steve Walker

Detachment (2011)
as Mr. 'Sarge' Kepler

12 Angry Men (1997)
as Juror 12

Young Guns II (1990)
as Patrick Floyd 'Pat' Garrett

To Live and Die in L.A. (1985)
as Richard Chance

Thief (1981)
as Katz & Jammer Bartender

Haven (2001)
as Jackson Connolly

Mulholland Falls (1996)
as Jack Flynn

The Skulls (2000)
as Ames Levritt

Seeking a Friend for the End of the World (2012)
as Trucker

The Contender (2000)
as Jack Hathaway

Passed Away (1992)
as Frank Scanlan

The Rat Pack (1998)
as John F. Kennedy

Gunshy (1998)
as Jake Bridges

Cousins (1989)
as Tom Hardy

Kiss the Sky (1998)
as Jess

CSI: Immortality (2015)
as Gil Grissom

Long Gone (1987)
as Stud Cantrell

The Beast (1996)
as Whip Dalton

Amazing Grace and Chuck (1987)
as Russell

Inside 'Manhunter' (2001)
as Himself

Friedkin Uncut (2018)
as Self

This Old Cub (2004)
as Himself

Curaçao (1993)
as Stephen Guerin

Hard Promises (1992)
as Joey

Keep the Change (1992)
as Joe Starling

The Staircase (1998)
as Joad

In the Kingdom of the Blind, the Man with One Eye Is King (1995)
as Tony C.

Blue Neon Night: Michael Connelly's Los Angeles (2004)
as Narrator

Wrigley Field: Beyond the Ivy (2001)
as Narrator

Counterfeit World: Making 'To Live and Die in L.A.' (2003)
as Self

100 Years of Wrigley Field (2014)
as Self - Narrator (voice)

Three Short Plays by Tracy Letts (2021)
as Ted

Manhunter (1986)
as Will Graham





