William Petersen is an American actor most well known for his starring role as Dr. Gilbert Grissom, nicknamed Gil, on the CBS television crime drama CSI: Crime Scene Investigation. William Petersen has appeared in several movies including The Skulls, The contender, The Rat Pack, Fear, Young Guns 2, and more. Petersen is also a very active in theatre, which has led him to leave CSI after season nine.
Petersen has been honored with a star on the Hollywood Walk of Fame.
Saturday, February 21, 1953
Evanston, Illinois, U.S.