William Thomas Sadler was born on April 13, 1950 in Buffalo, New York. He is a Saturn Award-winning American character actor.

Sadler took his first post-school role in Florida and soon relocated to Boston. He is known for his roles in the 1990 action film Die Hard 2, in the 1994 prison drama The Shawshank Redemption and in the 1991 comedy Bill & Ted's Bogus Journey.

He also has appeared in television series Roswell and Wonderfalls. Other film credits include Trespass, K-9, Project X, Disturbing Behavior, Kinsey, Purple Heart and Jimmy and Judy.

Sadler's TV guest appearances include In the Heat of the Night, Roseanne, Tru Calling, CSI, Numb3rs, and Law & Order: Criminal Intent.

His last credits include August Rush (2007), The Mist (2007) and TV series "Traveler" (2007).

Filmography

• Mineville (2009)
• "The Pacific" (2009) (mini) TV mini-series
• Shadowheart (2008)
• Nothing Sacred (2008)
• Stream (2008)
• "Medium" (1 episode, 2008)
• The Mist (2007)
• August Rush (2007)
• "Traveler" (8 episodes, 2007)
• Jesse Stone: Sea Change (2007) (TV)
• "The Black Donnellys" (1 episode, 2007)
• "Numb3rs" (1 episode, 2007)
• A New Wave (2007)
• The Wine Bar (2006)
• The Path to 9/11 (2006) (TV)
• Premium (2006)
• Jimmy and Judy (2006)
• "CSI: Crime Scene Investigation" (1 episode, 2006)
• Mr. Gibb (2006)
• Unspoken (2006)
• Confess (2005)
• "Law & Order" (1 episode, 2005)
• Devour (2005) 
• "Law & Order: Trial by Jury" (1 episode, 2005)
• "Tru Calling" (1 episode, 2005)
• "Third Watch" (1 episode, 2005)
• Purple Heart (2005)
• "JAG" (1 episode, 2004)
• Kinsey (2004)
• "Wonderfalls" (11 episodes, 2004)
• The Battle of Shaker Heights (2003)
• "Law & Order: Criminal Intent" (1 episode, 2003)
• "Ed" (1 episode, 2003)
• "Roswell" (58 episodes, 1999-2002)
• Another Life (2002)
• Skippy (2001)
• Witness Protection (1999) (TV)
• The Green Mile (1999)
• Stealth Fighter (1999)
• "Star Trek: Deep Space Nine" (3 episodes, 1998-1999)
• Reach the Rock (1998)
• Disturbing Behavior (1998)
• Ambushed (1998)
• RocketMan (1997)
• Solo (1996)
• Bordello of Blood (1996)
• "Poltergeist: The Legacy" (1 episode, 1996)
• "The Outer Limits" (1 episode, 1995)
• Tales from the Crypt: Demon Knight (1995)
• The Omen (1995) (TV)
• "Tales from the Crypt" (2 episodes, 1989-1994)
• The Shawshank Redemption (1994)
• Roadracers (1994) (TV)
• "Rebel Highway" (1 episode, 1994)
• Bermuda Grace (1994) (TV)
• Jack Reed: Badge of Honor (1993) (TV)
• Freaked (1993)
• Night Driving (1993) (TV)
• Trespass (1992)
• Rush (1991)
• Bill & Ted's Bogus Journey (1991)
• Tagget (1991) (TV)
• The Last to Go (1991) (TV)
• Two-Fisted Tales (1991) (TV)
• The Face of Fear (1990) (TV)
• The Hot Spot (1990)
• Die Hard 2 (1990)
• Hard to Kill (1990)
• K-9 (1989)
• "Gideon Oliver" (1 episode, 1989)
• "Hard Time on Planet Earth" (1 episode, 1989)
• "Murphy Brown" (1 episode, 1989)
• Unconquered (1989) (TV)
• "Hooperman" (1 episode, 1989)
• "Roseanne" (2 episodes, 1989)
• "Dear John" (1 episode, 1988)
• "Cadets" (1988) TV series
• "St. Elsewhere" (1 episode, 1988)
• "In the Heat of the Night" (2 episodes, 1988)
• "Private Eye" (7 episodes, 1987-1988)
• "Tour of Duty" (1 episode, 1987)
• Project X (1987)
• Private Eye (1987) (TV)
• "The Equalizer" (1 episode, 1986)
• Off Beat (1986)
• "Assaulted Nuts" (1985) TV series
• "Newhart" (1 episode, 1983)
• Hanky Panky (1982)
• The Neighborhood (1982) (TV)
• "Nurse" (1 episode, 1981)
• Charlie and the Great Balloon Chase (1981) (TV)
• The Great Wallendas (1978) (TV)
• "The CBS Festival of Lively Arts for Young People" (1 episode, 1977)

Awards

• Clarence Derwent Award "Biloxi Blues" 1985
• Drama-Logue Award "Biloxi Blues" 1985
• OBIE Award Performance "Limbo Tales" 1981