Matthew McConaughey, 43, seems to be the latest star proving himself as a serious actor by dropping excessive amounts of weight for a role. His last film, Magic Mike, costarring fellow beefcakes Channing Tatum, Alex Pettyfer, Matt Bomer and Joe Manganiello, featured a buff and bronzed McConaughey, but all that has changed since he has dropped 38 pounds, reports USA Today, for his portrayal of Ron Woodruff, a 1980s AIDS sufferer who sought the experimental treatment of AZT at the time of his illness, in the upcoming The Dallas Buyers Club, also starring Jennifer Garner, Jared Leto.

While McConaughey's drastic weight loss is getting the attention of news outlets everywhere, it was exactly what McConaughey had in mind. "I should not look healthy by the time I'm doing this," he told Larry King in June about the role, for which he has reportedly taken his 5'11" frame from 182 to 143 pounds.

McConaughey has done his best to prep for filming, which begins this weekend, says a source. "Matthew starts shooting this weekend, so he's at his absolute lowest weight," the source told People. "In a month, he'll begin to put it back on."

While McConaughey is back to packing on the pounds, his wife, Camilla, will be shedding her baby weight — she is set to deliver the couple's third child this winter.

The Dallas Buyer's Club is set for release sometime in 2013.

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