The Rule of Jenny Pen is a 2024 horror film based on Owen Marshall's short story.

The Rule of Jenny Pen was filmed in Taupō, Wellington and Lower Hutt, New Zealand, in 2023.

[3] In September 2024, was acquired by IFC Films / Shudder for distribution in North America, the UK and Ireland.

[7] Reviewer Alex Billington from FirstShowing described the film as "an instant horror classic".

[3] Lithgow and Rush shared the best actor award at Spain’s Sitges Film Festival in October 2024.