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Watch I Know What You Did Last Summer online in HD

5.620251h 51mHorror Thriller MysteryHD · Subtitles

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“You get the ending you deserve.”

About I Know What You Did Last Summer

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.

I Know What You Did Last Summer (2025) is a horror/thriller film running 1h 51m, directed by Jennifer Kaytin Robinson. It is available in HD on Cineby for 5 credits. Create an account, add credits and the unlock is yours permanently. Use the player controls for subtitles, quality and fullscreen.

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I Know What You Did Last Summer FAQ

How much does it cost to watch I Know What You Did Last Summer?

I Know What You Did Last Summer costs 5 credits on Cineby. Credits are $1 each, and an unlock is permanent — once bought, the film stays in your account and can be rewatched without paying again.

Do I need an account to watch I Know What You Did Last Summer?

Yes. Create an account, add credits, then unlock the film. Signing up is free and only takes an email and password.

Can I watch I Know What You Did Last Summer again after unlocking it?

Yes. The purchase is attached to your account, so returning to this page later opens the player directly. You are only charged once.

Who directed I Know What You Did Last Summer?

I Know What You Did Last Summer was directed by Jennifer Kaytin Robinson.

Can I watch I Know What You Did Last Summer on my phone?

Yes. Cineby is responsive and the player works in mobile browsers. Tap fullscreen on the player for a larger picture, and use the CC control for subtitles.