William Hasley: key obituary facts
Is William Hasley dead? Yes. William Hasley died on June 6, 2026, at age 78.
Cause of death: William Hasley's cause of death has not been publicly confirmed.
What was William Hasley known for?
He was an American biographer and television writer.
More about William Hasley
Gender: male.
Occupation: writer, screenwriter.
Born: 1947 or 1948Pittsburgh, Pennsylvania, U.S.
Occupations: Biographer, television writer.
William Hasley, an American biographer and television writer best known for work on “The Smurfs,” “Swift Justice” and “The Young Riders,” died on June 6, 2026, at the age of 78.
Born in Pittsburgh, Pennsylvania, in 1947 or 1948, he also co-wrote the motivational book “Finding the Champion Within” with Caitlyn Jenner. Hasley wrote for television series including “Fat Albert and the Cosby Kids” as well as the shows associated with his obituary notice, building a career that spanned both nonfiction and screenwriting.