Tatum Riley was one of the main characters appearing in the original Scream (1996).She is eighteen years old, a senior in high school, and one of the most popular girls in Woodsboro High. She is also the younger sister of Dewey Riley and the best friend of Sidney Prescott in Woodsboro since childhood.

She was the girlfriend of Woodsboro High student, Stu Macher, who was the accomplice killer to Sidney's murderous boyfriend, Billy Loomis, something she did not know.