Some actors take their craft to the extreme by altering their bodies to fit the role. Some actors pack on the pounds. Others lose the weight. Discover these insane diets that these actors used to lose weight for roles. Believe us, the dedication is insane:

Matthew McConaughey

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You can argue all you want that McConaughey’s acting skills are debatable. But the man is certainly dedicated to the craft. When he played an HIV stricken man in Dallas Buyer’s Club, he reportedly whittled himself down to 135 pounds on a liquid only diet.