The Emmy Award winner passed away at his home in Ridgefield, Connecticut on Friday (25May12), his daughter Katherine Hover tells the Associated Press.
His theatre credits include Slow Dance on the Killing Ground, Whisper into My Good Ear and Mrs. Dally Has a Lover.
Hanley won Emmys for his TV movies The Attic: The Hiding of Anne Frank and Something About Amelia, which starred Ted Danson as a father who has sexual relations with his daughter.
Roxana Zal, who played the abused teen, became the youngest primetime Emmy winner in history after scooping a trophy for the role when she was 14 years old.
Hanley also wrote several novels and the screenplay for the 1969 film The Gypsy Moths, starring Burt Lancaster and Gene Hackman.
No further details of Hanley's death were available as WENN went to press.