Perry died in a Los Angeles hospital, her agent Meg Davis confirmed.
She had been in steady decline since suffering a heart attack in December, Davis said.
She was then known as Juliet Hulme, later adopting a pen name in her writing career.
British crime writer Anne PerryPhoto by Colin McPherson/Corbis via Getty Images
The details were later discovered in journals the police found.
The film explored the relationship of the teens, culminating in the 1954 murder.
The film won the Silver Lion film at the 1994 Venice International Film Festival.
It was later Oscar nominated for Best Original Screenplay.
No information on Perrys survivors was immediately available.
