CSI: Crime Scene Investigation

William Petersen

William Petersen has a distinguished background in film, theatre and television, and played the role of Gil Grissom for nine seasons.

William Petersen

Plays Gil Grissom

Seasons 1 - 9

William Petersen has a distinguished background in film, theatre and television. He also serves as executive producer on CSI and in 2003 was nominated for a Golden Globe Award for his portrayal of Gil Grissom.

Petersen's television credits include Long Gone, The Rat Pack, The Beast and the Golden Globe Award-winning mini-series The Kennedys of Massachusetts.

Petersen's film roles include To Live and Die in LA, Manhunter, Cousins, Young Guns II, Fear, The Contender, and the films Hard Promises and Keep the Change - both of which he also produced.

In 1979, Petersen founded the Remains Theater Ensemble in Chicago with a group of fellow actors. In 1983, he starred as Jack Henry Abbott in In the Belly of the Beast, which he performed at the Wisdom Bridge Theatre in Chicago, at the Edinburgh Festival and at the Kennedy Center for the Performing Arts in Washington DC.

In 1996, Petersen made his Broadway debut in a revival of Tennessee Williams' The Night of the Iguana. He has also appeared in a number of regional stage productions, including A Dublin Carol, A Streetcar Named Desire, The Time of Your Life, Glengarry Glen Ross, Fool for Love and Speed-the-Plow.