Ryan Phillippe sees those I Know What You Did Last Summer rumors, - and thinks they're "cute," but false. On Saturday, July 19, Prime Video's Instagram page shared a clip of Phillippe, 50, in the 1997 teen horror flick, writing, "Reese Witherspoon auditioned for I Know What You Did Last Summer but changed her mind and withdrew. Instead, she recommended her then-boyfriend, Ryan Phillippe for the role of Barry." "Not sure that story is truuuuuue, but it's very cute.," Phillippe responded in the comments section.