Treat Williams, the actor known for his roles in the movies “Hair” and “Deep Rising” and the TV show “Everwood,” has died. He was 71.

Mr. Williams died on Monday after an S.U.V. crashed into his motorcycle in Dorset, Vt., the Vermont State Police said in a statement. He was thrown from his motorcycle and died at a medical center in Albany, N.Y.

No other details were immediately available.

This is a developing story.