Although Hellcats' Marty (Aly Michalka) has been searching for information about her father, when the series returns on Tuesday, she'll get more than she bargained for: a sister.
And who better to play star 's on-screen sis than her real-life sibling AJ Michalka. "It was kind of a no-brainer, you would think, [but] you don't see siblings play siblings ever," AJ tells TVGuide.com.
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