I Know What You Did Last Summer is an American horror media franchise owned by Sony Pictures Entertainment, and consisting of three slasher films and one television series based on the 1973 novel by Lois Duncan.

A group of teenagers in Colorado find themselves being stalked and killed one by one by a mysterious figure with a hook, exactly one year after they covered up a friend's accidental death.

[5] Prinze Jr. and Hewitt were confirmed as part of the cast in September and December 2024, respectively,[6][7] and the untitled film is scheduled for a release date of July 18, 2025.

[8] Amazon Studios acquired the rights in July 2019 to develop a television series adaptation with Neal H. Moritz and James Wan producing.

[11] Madison Iseman, Brianne Tju, Ezekiel Goodman, Ashley Moore, Sebastian Amoruso, Fiona Rene, Cassie Beck, Brooke Bloom, and Bill Heck star in the series.