I Know What You Did Last Summer
- Blwyddyn: 1997
- Gwlad: United States of America
- Genre: Horror, Thriller, Mystery
- Stiwdio: Summer Knowledge LLC, Mandalay Entertainment, Columbia Pictures, Original Film
- Allweddair: high school, police, blackmail, fisherman, cover-up, friends, revenge, murder, pageant, slasher, killer
- Cyfarwyddwr: Jim Gillespie
- Cast: Jennifer Love Hewitt, Sarah Michelle Gellar, Freddie Prinze Jr., Ryan Phillippe, Bridgette Wilson-Sampras, Johnny Galecki