Sloane Peterson is a fictional character from the 1986 film Ferris Bueller's Day Off. She is portrayed by actress Mia Sara and is known for her calm demeanor and supportive nature. Sloane is the girlfriend of the main character, Ferris Bueller, and plays a key role in his adventurous day off from school. In the film, Sloane is depicted as a smart and independent young woman who enjoys spending time with Ferris and his friends. Her character adds depth to the story, showcasing themes of friendship and youthful rebellion against authority. Sloane's character has become iconic in popular culture, representing the carefree spirit of the 1980s.