'I Know What You Did Last Summer' Cast -- 'Memba Them?!

After a dreadful 4th of July night back in 1996, a group of friends -- Sarah Michelle Gellar, Freddie Prinze Jr., Jennifer Love Hewitt, and Ryan Phillippe -- reconnect when they are faced with the killer consequences of their actions.

"I Know What You Did Last Summer" came out 24 years ago ... but the young cast in the slasher film haven't aged a bit. We don't know what you did last summer, but we sure know what you'll be doing this week for Halloween ... taking a look back at the cast of this iconic horror film!!