Born: February 21, 1953
Birthplace: Evanston, IL
Marital Status: 1st marriage: Joanne; daughter, Matie (b. 1975). 2nd marriage, Gina Cirone (m Jun 14 2003)
Credits: Please check out the IMDB Database
William was the youngest of six children born to a family in Evanston, Illinois. While he excelled at sports, his academic grades were poor, so while at Idaho State University his advisors recommended he take acting classes in order to boost his grade point average. Little did they know that William would flourish in the theatrical atmosphere, so much so that after he left school, Willian and Joanne (his girlfriend who soon became his wife) went to Spain where they started a Shakespeare company. Soon he and his wife (and new daughter) moved back to Evanston, where he dabbled in other jobs, but the lure of the theater took him to Chicago where he earned his Actor's Equity card in 1979 at the Victory Gardens Theater. With longtime friend Cindy Chvatal and actor Gary Cole, they co-founded the Remains Theater, where Petersen honed his acting abilities. His portrayal of Jack Henry Abbott in Belly of the Beast: Letters from Prison earned his the Joseph Jefferson award for best actor, which he reprised at the Kennedy Center and in London. He also received Joseph Jefferson Award nominations for The Tooth of the Crime and The Night of the Iguana. He appeared in a number of regional productions, including The Time of Your Life, A Streetcar Named Desire, Glengarry Glen Ross, Fool for Love and Speed-the-Plow. His Broadway debuted was in a revival of Tennessee Williams' Night of the Iguana.
His talent soon came to the attention of film directors, and he was asked to read for William Friedkin's cop thriller, To Live and Die in L.A. That film led to more, such as Manhunter, Cousins and Fear. In 1990, William and Cindy Chvatal formed High Horse Films. Their first project was Hard Promises, in which William starred with Sissy Spacek.
On television, he has been seen in Long Gone, The Rat Pack, , 12 Angry Men, The Kennedys of Massachusetts (which won a Golden Globe Award), the sci-fi miniseries The Beast and Keep the Change, which he also produced. It was only when CSI came along that Petersen decided to commit to his first television series, which he also produces.
Petersen resides with his wife in Los Angeles, and became a grandfather for the first time in October 2003.
For more information, check out the William Petersen - The Early Years and Charlie Rose transcript as well.
Also credited as William L. Petersen (full name William Louis Petersen)