
When five friends inadvertently cause a deadly car accident, they cover up their involvement and make a pact to keep it a secret rather than face the consequences. A year later, their past comes back to haunt them and they’re forced to confront a horrifying truth: someone knows what they did last summer… and is hell-bent on revenge. As one by one the friends are stalked by a killer, they discover this has happened before, and they turn to two survivors of the legendary Southport Massacre of 1997 for help.
Use Gatsby to find where to watch I Know What You Did Last Summer (2025) online. This movie page brings together streaming availability, cast details, ratings, and related discovery links in one place.
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Gatsby shows where to watch I Know What You Did Last Summer online, including streaming, rental, and purchase options when availability data is listed for your region.
I Know What You Did Last Summer may be available through Netflix, Fandango At Home (Rent), Fandango At Home (Buy) where those providers are listed.
The cast section includes Jennifer Love Hewitt, Madelyn Cline, Sarah Michelle Gellar, and more, with links to Gatsby cast and filmography pages.
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When five friends inadvertently cause a deadly car accident, they cover up their involvement and make a pact to keep it a secret rather than face the consequences. A year later, their past comes back to haunt them and they’re forced to confront a horrifying truth: someone knows what they did last summer… and is hell-bent on revenge. As one by one the friends are stalked by a killer, they discover this has happened before, and they turn to two survivors of the legendary Southport Massacre of 1997 for help.







