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Kristen Stewart plays Bella Swan in "New Moon." She is 19 years of age and has already been 10 years in the business. Kristen Stewart reprises her role as Bella Swan, the love interest of both sparkly vampires and hunky werewolves in "New Moon." She started her acting career with bit parts like "The Flintstones in Viva Rock Vegas" before landing a major part in 2002's "Panic Room" as Jodie Foster's diabetic daughter. Aside from her "Twilight" duties, Stewart will also play Joan Jett in the upcoming bio-pic "The Runaways."