Leven Rambin, who recurred as Mark's daughter on Grey's Anatomy last season and will pop up shortly on CSI: Miami, will soon play a key character on One Tree Hill.

TV Line sources confirm that Rambin’s young woman will show up on The CW hit and play a role in an adoption storyline that also involves Brooke. Might she be the person at the center of this spoiler? It seems quite likely.

Rambin will debut on the show's 19th episode of the season. She'll stick around for a few weeks.

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