William is 5' 8" (1.73 m) in height.
William portrayed 'David Drayton' in the audio-book version of The Mist.
1993 - Saturn Award "Best Supporting Actor" for Bill & Ted's Bogus Journey
In 2005, William played the lead role of Julius Caesar on Broadway with actor Denzel Washington playing Brutus.
William is a graduate of Cornell University with a masters degree in fine arts. His father told him to get a degree so that he'd have something to fall back on if acting didn't work out. He spent two years studying there.
In 1981 William won the Obie and Villager Awards for his role in the off-off-Broadway play Limbo Tales.
William starred in the original Broadway and Los Angeles cast of Neil Simon's Biloxi Blues as Sergeant Toomey. The role won him a Dramalogue award, Clarence Dewert Award, and Drama Desk nomination.
William helped his Roswell co-star Nick Wechsler learn how to play guitar. In addition to guitar, William knows how to play the ukelele and the mandolin.
William proudly features a section on his official website devoted solely to fan fiction.
William won one of the top prizes in his high school variety show performing a monologue. It was entitled "Banjo Bill Sadler".
William's parents are named William and Jane Sadler.
William graduated from Orchard Park High School in 1967.
William has been married to Marni Joan Bakst since 1977. They have one child together.
William: (on playing Hamlet at the Colorado Shakespeare Festival) It was heaven. Playing one of the greatest roles ever written and getting paid for it was a fabulous revelation. I had a wonderful time.
William: (on getting a college degree) My father insisted that I get my teaching certification. Something to fall back on. Not a bad idea given the odds against ever making a living as an actor.
William: (on playing the guitar) I was never a great player but I loved to perform. I listened to folks like Pete Seeger, Bob Dylan, and Woody Guthrie and tried to sound like them. I'm sure I wasn't very good but what I lacked in musical chops, I made up for in volume and enthusiasm!
William: (Joking about 'The Shawshank Redemption') Nobody knows what a shawshank is, and redemption sounds religious, so who's going to go see that?