Helen Shivers is a fictional character from the 1997 horror film I Know What You Did Last Summer. She is portrayed by actress Sarah Michelle Gellar. In the movie, Helen is a high school student who becomes one of the targets of a mysterious killer after a group of friends accidentally cover up a hit-and-run accident. Helen is characterized by her ambition and desire to succeed, particularly in her pursuit of a career in acting. Throughout the film, she faces intense fear and danger, showcasing her resilience and determination to survive against the odds. Her story highlights themes of friendship, guilt, and the consequences of one's actions.