Most dramatic actor transformations

Published On: Oct 16 2012 02:53:40 PM CDT   Updated On: Jan 23 2014 08:57:57 AM CST

Matthew McConaughey and Jared Leto are receiving buzz during awards season for their dramatic transformations in "Dallas Buyers Club." Take a look at some of the other most dramatic actor transformations ever seen on film.

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20th Century Fox

But Hanks did just that, losing 55 pounds over four months with strenuous diet and exercise regimen and letting his hair and beard grow for weeks in order to play emaciated castaway Chuck Noland in 2000's "Cast Away."

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