Actress Fills Lindsay Lohan's Slot

Lindsay Lohan's replacement has been named for the movie role she lost because she wasn't considered "bankable" ... and, ironically, you probably don't recognize her.

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We're told LiLo's character in "The Other Side" will now be played by Olivia Thirlby -- who's only appeared in a few movies, including "Juno" and "The Wackness."

Well, better safe than sorry...