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'Jack and Jill' (2011)

Adam Sandler plays family man Jack Sadelstein, right, and his needy, manipulative sister from the Bronx, left, in "Jack and Jill," which hits theaters Nov. 11. Besides double vision, the movie may inspire a sense of déjà vu in viewers -- after all, making an actor do double duty is a time-honored Hollywood tradition. Let's take a look at a few through the years.
Tracy Bennett / Columbia Pictures
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