Name	William Peterson
Height	5' 10"
Naionality	American
Date of Birth	21 February 1953
Place of Birth	Evanston, Illinois, USA
Famous for

William Louis Petersen (born February 21, 1953) is an American actor and producer, best known for playing Dr. Gilbert "Gil" Grissom on the hit CBS series CSI: Crime Scene Investigation.

He has also portrayed President John F Kennedy in the 1998 TV film The Rat Pack. Petersen is notoriously selective about the film roles he chooses, and has turned down roles in several films that went on to become modern classics.