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.

dramatic movie transformation - Zellweger 2
14 / 57
Miramax Films

But the actress went from a size 6 to 14, adding 30 pounds to her frame, not once, but three times for the "Bridget Jones's Diary" movies. Zellweger gorged on doughnuts and pizza for the first film, but worked with a nutritionist for the two sequels to gain weight with a controlled high-calorie diet.

Upload Photos / Videos