"I Know What You Did Last Summer" is a horror franchise that has recently been revived with a new 2025 film and a 2021 TV series adaptation.

2025 Film Version

• The 2025 film is a slasher movie directed by Jennifer Kaytin Robinson, featuring a new group of five friends who accidentally cause a deadly car accident and cover it up with a pact to keep it secret

• A year later, they are stalked by a killer who knows their secret and seeks revenge. They discover this pattern of violence has happened before and enlist help from two survivors of the original 1997 Southport Massacre

• The cast includes Madelyn Cline, Chase Sui Wonders, Jonah Hauer-King, Tyriq Withers, Sarah Pidgeon, and also features Jennifer Love Hewitt and Freddie Prinze Jr. reprising their original roles

• The movie is produced by Neal Moritz and is set for theatrical release on July 18, 2025

2021 TV Series

• The TV series, released on Amazon Prime Video in 2021, is a modern teen slasher adaptation based on the original 1973 novel by Lois Duncan

• It follows a group of teenagers stalked by a killer one year after a fatal accident on their graduation night

• The series stars Madison Iseman, Brianne Tju, Ezekiel Goodman, Ashley Moore, and Sebastian Amoruso, among others

• The show was canceled after one season despite mixed reviews

Both the film and series explore themes of secrets, guilt, and revenge tied to a deadly accident covered up by a group of friends, with the 2025 film linking back directly to the original 1997 movie's storyline and characters

. In summary, "I Know What You Did Last Summer" currently exists as a 2025 slasher film sequel with legacy characters and a 2021 Amazon Prime teen slasher series, both revolving around friends haunted by a deadly secret from the past