I Know What You Did Last Summer Costumes

Check out costumes from the movie I Know What You Did Last Summer to get costume ideas for your next Halloween or costume party.

Movie Overview

As they celebrate their high school graduation, four friends are involved in a hit-and-run accident when their car hits and apparently kills a pedestrian on an isolated roadway. They dispose of the body and vow to keep the incident a secret, a year later somebody starts sending them letters bearing the warning "I Know What You Did Last Summer".

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