Not every Hollywood actor is as lucky as Chris Pratt. While Anna Faris' hubby recently announced he's pigging out in attempt to reach his goal weight of 300 lbs for a part in the upcoming movie Zero Dark 30, many more of his peers have been forced to drastically and painfully diet to slim down for certain coveted roles.
The latest male celeb to suffer for his craft: Matthew McConaughey, who's dropped 30 pounds to play an HIV-positive patient in the upcoming film, The Dallas Buyer's Club. His new, pale and shockingly gaunt frame was especially daunting at a recent event when the actor was photographed with wife Camila Alves, who was not only rocking her normal deep tan and curvy body, but had the extra oomph of her pregnant belly to boot. Next to her, McConaughey looked nearly invisible.
Who else has laid off the bread, the potatoes and nearly everything else on the dinner table for the sake of art? Have a peek at our gallery to stars' most dramatic weight loss!

 Thanks to his crash diet to play a junkie in Courage Under Fire, Matt Damon reportedly damaged his adrenal glands!

 To lose 60 pounds for his role in the indie film The Machinist, Christian Bale ate only an apple a day and a can of tuna for months

 Matthew McConaughey, currently playing an HIV-positive man, says his body eventually got used to feeding on itself. Ew!

 Tom Hanks dropped a shocking 55 pounds to star in Castaway...but he earned the Oscar for it. A fair trade?

 Men aren't the only ones doing it. Anne Hathaway needed a starved, bony look for her upcoming turn in Les Miserables, out this Christmas