... movie, and by Mariel Hemingway in the 1983 film "Star 80."         Everyone knows James Dean won an Academy Award for "Rebel Without a Cause." It was also a breakout role for Dean's co-star Sal Mineo, who was nominated for an Oscar. Sadly, both Dean and Mineo's lives came to tragic ends. Dean died in a car accident in 1955, and Mineo was stabbed to death in West Hollywood in 1976. Dean was 24, Mineo was 37.     The murder of John Lennon in December 1980 stunned the music ...