I Know What You Did Last Summer (1997)

Believe it or not, I had never seen I Know What You Did Last Summer before now. I've seen it parodied in Scary Movie and probably other movies too, but never watched the actual film. Then the other day I was in the mood for something light and I finally watched it. 

The story follows four friends, Julie (Jennifer Love-Hewitt), Helen (Sarah Michelle Gellar), Ray (Freddie Prinze Jr.), and Barry (Ryan Phillippe). On their way home from a party on the beach, they accidentally hit and kill a man. After some arguing, they decide to dump the body in the water and never talk about what happened ever again. A year later, Julie returns home from college only to find a letter simply saying, "I know what you did last summer". Shocked, she reunites with her friends and tries to figure out who is after them.