News Treat Williams, actor from ‘Everwood’ and ‘Hair,’ dead at 71 after motorcycle accident, family says June 12, 2023 Charles Trepany, USA TODAY Comments Off on Treat Williams, actor from ‘Everwood’ and ‘Hair,’ dead at 71 after motorcycle accident, family says Treat Williams, an actor who starred in the film version of the musical "Hair" and on the television series "Everwood," has died. He was 71.