I Know What You Did Last Summer costars Sarah Michelle Gellar and Jennifer Love Hewitt have been rumored to have a frosty offscreen relationship since the horror classic's 1997 release. The controversy started over persistent rumors that Hewitt asked producers to kill off Gellar's character Helen Shivers in the original IKWYDLS so her costar couldn't return for 1998's sequel, I Still Know What You Did Last Summer. (Hewitt has always denied having any part of Gellar's character being written out of the franchise.