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Kristen Stewart

WESTWOOD, CA - NOVEMBER 17: Kristen Stewart arrives at the Los Angeles premiere of "Twilight" at the Mann Village and Bruin Theaters on November 17, 2008 in Westwood, California. (Photo by Steve Granitz/WireImage)

'Twilight' Stars: Then and Now

The young cast of "Twilight" has really grown up since the first movie debuted four years ago. As fans prepare for the fifth and final installment of the vampire love story, which opens on November 16, let's take a look back at how they've changed.