Started playing the ukulele when he was 8 years old.
Played guitar in a cover band called the Knight Ryders during high school. He left the band for college and soon after, all but one of the remaining band members were killed in a car accident on their way home from a gig.
Once performed stand-up under the name "Banjo Bill" Sadler.
Won a Clarence Derwent Award and a Drama-Logue Award in 1985 for his portrayal of Sgt. Toomey in Neil Simon's Broadway hit Biloxi Blues, in which he starred opposite Matthew Broderick.
Appeared as the Grim Reaper in 1991's Bill & Ted's Bogus Journey.
Provided the voice of Victor in the video game Fallout: New Vegas.
William Sadler — Father
Marni Joan Bakst — Wife
Jane Sadler — Mother
Sadler Colley Bakst — Daughter
State University of New York College, Geneseo, New York, United States (BA in Drama, BS in Speech Communication, 1971); Cornell University, Ithaca, New York, United States (MFA in Acting)