'I Know What You Did Last Summer' cast by Isaac Anthony for People July 2025

I Know What You Did Last Summer is an upcoming American slasher film directed by Jennifer Kaytin Robinson, who co-wrote the screenplay with Sam Lansky from a story by Leah McKendrick and Robinson. It is a sequel to I Still Know What You Did Last Summer (1998) and the fourth installment in the I Know What You Did Last Summer franchise. The film stars Madelyn Cline, Chase Sui Wonders, Jonah Hauer-King, Tyriq Withers, Sarah Pidgeon, Billy Campbell, Gabbriette Bechtel, Austin Nichols, with Freddie Prinze Jr. and Jennifer Love Hewitt reprising their roles from the first two films. The plot takes place 27 years after the Tower Bay murders, when another hook-wielding killer appears and begins targeting a group of friends one year after they covered up a car accident in which they supposedly killed someone.

Plans for a fourth film in the franchise started in 2014, when Mike Flanagan and Jeff Howard signed on to write a reboot with no connection to the previous installments. However, this version ultimately fell through. Following the cancellation of the 2021 television series adaptation, the project was relaunched when Robinson pitched her version to Sony Pictures. The film was put into early development in February 2023, with producer Neal H. Moritz returning. Prinze Jr. and Hewitt were confirmed to be returning in 2024, with the new cast members joining throughout the year. Filming took place between October 2024 and March 2025 in New South Wales and Los Angeles.

I Know What You Did Last Summer premiered at The United Theater on Broadway in Los Angeles on July 14, 2025, and is scheduled to be theatrically released by Sony Pictures Releasing in the United States on July 18.