The role of Zelda, Rachel’s terminally ill sister, was played by a man. Director Mary Lambert wanted Zelda and her scenes to frighten the audience but did not believe that a 13-year old girl was scary so she cast Andrew Hubatsek in the role to make something be “off about Zelda.”

Read more about this casting choice at Bloody Disgusting: [It Came From the ’80s] The Traumatic Nightmare of Zelda in ‘Pet Sematary’.
Find more behind-the-scenes facts at IMDb Trivia: Pet Sematary (1989).