The 2025 version of "I Know What You Did Last Summer" has a runtime of 1 hour and 51 minutes (111 minutes). The original 1997 film has a runtime of 1 hour and 41 minutes (101 minutes). So to clarify:

• 2025 film runtime: 111 minutes
• 1997 film runtime: 101 minutes

The 2025 film is the more recent installment in the franchise and runs longer than the original 1997 film. The 2025 film was released on July 18, 2025, and directed by Jennifer Kaytin Robinson. If you were referring to a specific version, the mentioned runtimes should cover both the classic and the latest release.