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According to Entertainment Weekly, the 22-year-old will star as David, a young man with a cruel streak and a habit of lying.
The character - who will reportedly be taken under Sylar's wing - is to make his Heroes debut in the Volume Four: Fugitives storyline, which will make up the last 12 episodes of season three.
Byrd has also appeared in the horror remake The Hills Have Eyes and the short-lived series Clubhouse.
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