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Hilarie Burton, auditioned for the part of Ed Harris's daughter in the film Radio.
Murray's mother left him when he was young, and Lucas was abandoned by his father .
Murray's passion for the role led the producers to cast him as Lucas.
The producers were originally unsure as to who Murray would play.
Series creator Mark Schwahn wanted him to play the character of Nathan Scott since Murray had played a bad guy several times before, he felt it was only natural to give him this role.