I Still Know What You Did Last Summer is a 1998 slasher film directed by Danny Cannon and written by Trey Callaway. It is the sequel to I Know What You Did Last Summer (1997), and the second installment in the franchise of the same name. It stars Jennifer Love Hewitt, Freddie Prinze Jr. and Muse Watson, who reprise their role from the first film, while Brandy, Mekhi Phifer, Bill Cobbs, Matthew Settle, Jennifer Esposito, Jack Black, Jeffrey Combs, and John Hawkes also star. The film takes place one year after the first film and again follows the character of Julie James (Hewitt), who wins a vacation to The Bahamas with her friend group. During their vacations, they are targeted by a killer.

I Still Know What You Did Last Summer was released theatrically in the United States on November 13, 1998. It received negative reviews and grossed $40 million domestically on a budget of $24 million. Worldwide, it earned $84 million, making it a certified box office success.

It was followed by a straight-to-video standalone sequel, I'll Always Know What You Did Last Summer, in 2006. A direct legacy sequel is scheduled to be released by Sony Pictures on July 18, 2025.