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September 11, 2026Short & citedBlog
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Kept by Bryan McAllister — short guides, clear facts, and the Canadian angle when it matters.
Screen & Stage • Film

I Know What You Did Last Summer

I Know What You Did Last Summer is a 1997 American slasher film about four teenagers who are stalked by a hook-wielding killer after covering up a fatal car accident.

Updated September 11, 20261 min readCited sources

I Know What You Did Last Summer is a 1997 American slasher film about four teenagers stalked by a hook-wielding killer after covering up a fatal car accident. It launched a franchise that includes multiple sequels and a TV series.

What it is

Directed by Jim Gillespie and written by Kevin Williamson, the film is loosely based on Lois Duncan's 1973 young adult novel. It stars Jennifer Love Hewitt, Sarah Michelle Gellar, Ryan Phillippe, and Freddie Prinze Jr. as the four friends whose secret comes back to haunt them.

Key details

Released theatrically by Columbia Pictures on October 17, 1997, the film was a commercial success. It was followed by sequels in 1998, 2006, and 2025, plus a 2021 television series. The franchise remains familiar to Canadian audiences through home video and streaming availability.

Why it matters

The film helped revive the slasher genre in the late 1990s and cemented the careers of its young cast. Its hook-wielding killer and central premise—a secret accident leading to deadly consequences—became iconic in horror pop culture.

In short

  • Four friends cover up a fatal hit-and-run and are stalked a year later.
  • Stars Jennifer Love Hewitt, Sarah Michelle Gellar, Ryan Phillippe, Freddie Prinze Jr.
  • Released October 17, 1997; spawned sequels and a TV series.
  • Loosely based on Lois Duncan's 1973 novel.
Canadian angle

The film is part of an internationally known horror franchise that has had theatrical release and home-video availability in Canada, and it remains familiar to Canadian audiences through repeated sequels and TV adaptation.

Quick questions

What is I Know What You Did Last Summer about?
It is about four friends who hide their involvement in a fatal car accident and are later stalked by a hook-wielding killer who knows their secret.
Who is in the cast?
The main cast includes Jennifer Love Hewitt, Sarah Michelle Gellar, Ryan Phillippe, and Freddie Prinze Jr.
Does the film have sequels?
Yes. It was followed by sequels in 1998, 2006, and 2025, along with a 2021 television series.

Sources

  1. Wikipedia — https://en.wikipedia.org/wiki/I_Know_What_You_Did_Last_Summer
    Supports: 1997 release date, main cast, director, writer, plot premise, franchise status, sequels
  2. IMDb — https://www.imdb.com/title/tt0119345/plotsummary/
    Supports: Plot summary involving a fatal accident and later stalking
  3. Wikipedia — https://www.wikiwand.com/en/articles/I_Know_What_You_Did_Last_Summer_(novel)
    Supports: Connection to Lois Duncan's 1973 novel
  4. Rotten Tomatoes — https://www.rottentomatoes.com/m/i_know_what_you_did_last_summer
    Supports: Synopsis of the film's premise