Bill S. Preston is a fictional character from the popular film series Bill & Ted. He is portrayed as a laid-back teenager with a passion for music and a dream of forming a successful band. Bill is known for his friendly demeanor and loyalty to his best friend, Ted Logan. In the films, Bill and Ted embark on time-traveling adventures to complete their history project, which leads them to meet various historical figures. Their journey emphasizes themes of friendship, creativity, and the importance of learning from the past. Bill's character is often seen as a symbol of youthful optimism and the pursuit of dreams.