Claim: Ryan Phillippe starred in the 1997 film I Know What You Did Last Summer.
Evidence: After appearing as Billy Douglas on the soap opera One Life to Live , he came to fame in the late 1990s with starring roles in a string of films , including I Know What You Did Last Summer , Cruel Intentions , and 54.
I Know What You Did Last Summer is a 1997 American slasher film written by Kevin Williamson and directed by Jim Gillespie.