In the mid 90s, Gellar wasn't just known as Buffy. Thanks to a couple of horror flicks, she was also considered to be a Scream Queen. Her first box office hit was the teen thriller I Know What You Did Last Summer. Starring opposite Jennifer Love Hewitt, the film was a hit, and grossed over $100 million. The actress followed it up with a minor role in Wes Craven's Scream 2.