The cast of the 2025 film "I Know What You Did Last Summer" includes:
- Madelyn Cline as Danica Richards
- Chase Sui Wonders as Ava Brucks
- Jonah Hauer-King as Milo Griffin
- Tyriq Withers as Teddy Spencer
- Sarah Pidgeon as Stevie Ward
- Billy Campbell as Grant Spencer
- Freddie Prinze Jr. as Ray Bronson (returning from original films)
- Jennifer Love Hewitt as Julie James (returning from original films)
- Gabbriette Bechtel as Tyler Trevino
- Austin Nichols as Pastor Judah
- Joshua Orpin as Wyatt
- Georgia Flood as Hannah Decker
- Sarah Michelle Gellar as Helen Shivers (returning)
- Brandy Norwood as Karla Wilson
- Isaiah Mustafa as Andrew (uncredited appearance)
This cast blends new faces with veteran actors reprising their roles from the original series.
